2030 Climate Action PlanBoston’s 2030
Climate Action
Plan —
Unpacked
Boston released a 110-page roadmap for tackling climate change. This guide covers all of it: what it commits to, what it’s still figuring out, and where the gaps are.
Summarizes the official 2030 Climate Action Plan (April 2026). All numbers from that document. Plain-language guide. Trains, Bikes & Bus — Bolder Path sections are our editorial, not city positions.
Version 4 · May 2026 · trainsbikesbus.comStart here
What is this plan, and why does it matter?
Boston has tracked its citywide greenhouse gas emissions every year since 2005. This plan is the most comprehensive answer yet to: what do we actually do about it?
The context
What’s already happening to Boston’s climate?
Climate change isn’t a future problem. These are real events that have already happened in Boston — and they’re accelerating.
historical avg 1971–2000
projected by 2030 (high emissions)
June 24, 2025 — 102°F.[16] Boston’s hottest June day ever recorded. Downtown and Chinatown can run 10°F hotter than the surrounding city due to the urban heat island effect: dense pavement, few trees, older buildings that trap heat.
The last five years have all ranked among Boston’s ten hottest on record. If current global emissions continue, Boston could see up to 90 days over 90°F by 2070 — nearly the entire summer.
May 22–23, 2025 — A nor’easter flooded the Orange Line near Ruggles Station[17], shutting it down for four hours during the evening rush. Water backed up near Roxbury Crossing’s electrified third rail. Shuttle buses replaced service from Back Bay to Forest Hills.
The plan estimates there are approximately 20,000 basement-level housing units in Boston, about 28% of which are in coastal flood zones. Basement apartments are often the most affordable housing in the city — and among the most flood-vulnerable.
- ~16,000 residents are exposed to a major coastal flooding event today
- The City owns only 7.5 of Boston’s 47 miles of coastline — most is private, state, or Massport land
- Sea levels could rise up to 3 feet in Boston Harbor by 2070[19]
About 25% of Boston households are energy-burdened — spending more than 6% of income on energy bills because of poorly-insulated buildings, old heating systems, and high utility rates. 65% of Bostonians rent, and half are “rent-burdened,” paying more than 30% of income on housing.
Climate change compounds these: longer pollen seasons worsen asthma; flooding damages homes; heat waves spike electricity bills and ER visits. In 2024, Boston residents lost $394,519 in a single month (April 2024) to predatory third-party electricity suppliers — disproportionately in Roxbury, Dorchester, Mattapan, Hyde Park, and Mission Hill.
A blizzard in late January 2022 dropped a record-tying 23.6 inches of snow in a single day (January 29), tying a 2003 record. Over 100,000 power outages, roads closed, transit disrupted. ⚠️ Note: The official plan states the date as January 28 — this is an error in the source document. The record snowfall fell on the 29th; only 0.2 inches fell on the 28th. It tied rather than broke the existing record.
The targets
What does Boston actually commit to by 2030?
Every goal has a number. Every number will be reported publicly every year.
Emissions Reduction Targets
Resilience Targets
| Climate Hazard | What’s being measured | 2030 Target | 2050 Target |
|---|---|---|---|
| 🌡️ Heat | ER visits for heat illness per 100,000 | 25% fewer visits | 60% fewer visits |
| 🌳 Tree canopy | Citywide average coverage | +0.5% citywide avg | 35% citywide min |
| 🌧️ Stormwater | Greened acres added | +300 acres (~1% of city) | +1,200 acres |
| 🌊 Coastal flooding | Residents protected from flood pathways | 10,000 of ~16,000 at-risk | All exposed residents |
| 🚨 Cross-hazard | City capital projects screened for climate risk | 100% screened | 100% built to future standards |
| 🧑🤝🧑 Emergency prep | Neighborhoods with trained CERT teams | 100% of neighborhoods | Maintain coverage |
Leading by example
City government’s own buildings, vehicles, and parks
Before asking residents and businesses to change, the city is changing itself. Municipal operations cover city buildings (schools, libraries, firehouses), the vehicle fleet, and parks maintenance.
The Renew Boston Trust (RBT) is the city’s energy savings performance contracting program — contractors identify and implement energy upgrades across municipal buildings, paid back through the resulting utility savings. Over the next five years, RBT is pivoting from basic efficiency projects to full building decarbonization: heat pumps, solar assessments, cool roofs, and battery storage.
Most large city buildings are covered by BERDO, so the city is essentially subject to its own law. The city is also expanding its demand response program — enrolling more buildings to reduce energy use during peak grid demand periods.
Continue & Scale
Starting in 2026, the city will only purchase zero-emission light-duty vehicles, with limited exceptions for specialized equipment. A fleet request review body will also right-size vehicle purchases and phase out larger-than-needed vehicles.
The city has 71 Level 2 and 7 fast-charging ports at its Frontage Road facility. Emergency service vehicles are being electrified first, given their high-visibility impact.
Start
Strategy COB3 shifts park maintenance away from gas-powered tools (mowers, blowers) to electric alternatives, while also improving horticultural practices: more native plantings, more biodiversity, better stormwater management through park design.
Continue & Scale
Biggest source of emissions
Buildings: The single biggest challenge
Buildings account for approximately 70% of Boston’s greenhouse gas emissions — and nearly 60% of all Boston buildings were built before 1950. Old, poorly insulated, fossil-fuel-heated buildings are the core problem.
Launched October 2025, Boston Energy Saver is a one-stop shop connecting renters, homeowners, landlords, and small businesses to weatherization and electrification programs. It coordinates with MassSave (the state utility program) and city financing tools like the HomeWorks Green Loan Program.
The goal: 10,000 weatherizations and 5,000 heat pump installations in small buildings through this program. The city signed an MOU with Eversource and National Grid to direct $150 million in MassSave funding here.
The BHA owns or oversees approximately 10,000 rental units housing more than 17,000 Bostonians. It has set an ambitious goal of fossil-fuel-free public housing by 2030. Progress already underway:
- Franklin Field Apartments, Dorchester: First networked geothermal project in Boston — 7 buildings, 129 apartments transitioning off gas boilers to ground-source heat pumps (partnership with National Grid)
- Pond Street Apartments, Jamaica Plain: Geothermal heating + solar PV + envelope upgrades for 44-unit elderly building
- Doris Bunte Apartments, Roxbury: Historic high-rise renovation including air source heat pumps
- Ausonia Apartments, North End: 100-unit senior building; electrified heating + flood protection upgrades
Barrier: federal funding gaps. BHA depends heavily on federal capital funds that are uncertain.
The city launched the Healthy and Green Retrofit Pilot using ARPA funds — building owners receive up to $50,000 for energy retrofits, but must commit to keeping rents affordable for 10 years for households below 80% of Area Median Income. Pilot projects at Hano Homes in Allston and Mildred C. Hailey Apartments in Jamaica Plain.
The Boston Acquisition Fund (2024) is a public-private revolving loan fund to preserve naturally occurring affordable housing from being flipped to market rate. The city will explore prioritizing these buildings for energy upgrades.
In early 2025, Mayor Wu enacted Net Zero Carbon Zoning — requiring most new large buildings to produce zero net emissions from the day they open. Buildings over 50,000 sq ft must also report their embodied carbon (the emissions in construction materials themselves). Boston became the first US city to require this.
The Office-to-Residential Conversion Program (launched 2023) encourages adaptive reuse of vacant downtown office buildings rather than demolition. Goal: 2,000 new housing units and 2 million sq ft revitalized by 2026. Over 1,000 units already proposed. Participating buildings must meet affordability standards (17% of units below 60% AMI) and energy efficiency requirements.
Trains, Bikes & Bus — Bolder PathThe biggest climate lever the plan doesn’t touch: housing densityDense housing is a climate strategy. This plan has no section on housing density, single-family zoning, or building height limits — but these may be the highest-leverage long-term climate actions Boston could take. The research is clear: people living in dense, walkable neighborhoods have dramatically lower per-capita carbon footprints than people in low-density areas. Shared walls mean less heating energy per household. Walkable neighborhoods mean fewer car trips. Dense neighborhoods make transit economically viable.
Boston’s existing triple-decker tradition is actually ideal: 3–6 family buildings, shared walls, good insulation potential, served by transit, with neighborhood character. The problem is Boston’s zoning still allows and in many areas encourages single-family development — the most energy-intensive, land-consuming, car-dependent housing type.
- Eliminate single-family-only zoning citywide — allow at minimum triple-deckers (3-family buildings) in all residential zones. Massachusetts’ MBTA Communities Act requires multifamily near transit, but Boston could go further citywide.
- Remove height limits in transit-accessible areas — more floors per building means more housing with less land, less energy per unit, and lower per-capita infrastructure costs.
- Tie density bonuses to climate performance — allow taller buildings in exchange for higher energy efficiency standards, all-electric systems, and affordable unit requirements.
- Parking reform is density reform: minimum parking requirements make housing more expensive, prioritize car ownership, and consume land that could be housing. Eliminating them in areas within walking distance of frequent transit is both a housing and climate policy.
The plan’s Squares + Streets zoning update and the Office-to-Residential Conversion Program are steps in the right direction — but they’re modest. The 60% of Boston’s transportation emissions that come from commuters driving in from outside the city is partly a function of where those workers can afford to live. More housing density in Boston = shorter commutes = lower regional emissions.
Renters (65% of Bostonians) face a “split incentive” problem: landlords own the heating system, tenants pay the utility bills. Landlords have little financial motivation to upgrade. The plan has no strong mechanism to force this — Boston Energy Saver is voluntary. Renter protections are mentioned but not specifically required.
Restaurants rely heavily on gas for cooking. The plan acknowledges the challenge and proposes a task force in 2026, with a report in 2027. No committed solution.
Historic buildings face regulatory and technical barriers to insulation and electrification — also just a task force forming in 2026.
Trains, Bikes & Bus — Our takeFor renters: a mandatory retrofit trigger at sale, rental registration, or lease renewal — similar to how Cambridge has approached rental housing. Tying weatherization subsidies to binding multi-year affordability requirements (as the Healthy + Green Retrofit pilot already does for affordable housing).
For restaurants: a dedicated commercial kitchen electrification subsidy pool through MassSave, similar to programs in California. The 2027 task force report deadline is slow given the 2030 target.
For historic properties: a dedicated decarbonization fund using Historic Tax Credits, combined with streamlined guidance for common retrofit approaches in Boston’s dense historic neighborhoods.
Second-biggest source
Transportation: Getting people out of cars — and electrifying what remains
Transportation is the second largest source of Boston’s emissions — accounting for nearly a third of the city’s total, with 91% of that coming from passenger vehicles. About 60% of Boston’s transportation emissions come from commuters coming in from outside the city.
The MBTA’s Bus Network Redesign (authorized 2022) aims to increase bus service by 25% by 2029[23]. New routes rolled out quarterly since 2024. Phase I routes already saw a 20% year-over-year ridership increase.
The city is implementing bus priority — dedicated lanes, queue jumps, signal priority — on key corridors: Blue Hill Avenue, Tremont/Columbus, Lower Broadway/Alford St, Route 57, Hyde Park Ave, Rutherford Ave, and North Station–Seaport Rapid Bus.
Fare-free bus routes 23, 28, and 29 (launched with ARPA funding in 2022) serve the highest-ridership corridors in the city. The free-fare pilot concludes in 2026 when ARPA funding expires. The city wants to make these routes permanently fare-free — but needs a new sustainable funding source. Five percent of riders said they would have driven if the buses weren’t free.
Bus shelter improvements: MBTA allocated $15M for improvements to 100+ stops (shelters, benches, real-time arrival screens, accessibility). New Street Furniture Contract will update shelters citywide.
Continue & ScaleThe Fairmount Line serves Dorchester, Mattapan, and Hyde Park — communities of color that have historically been transit-underserved. The MBTA has committed to transitioning the fleet to electric vehicles beginning 2028, delivering faster, quieter, cleaner service. The city is advocating for subway-like frequency on the line.
The commuter rail fare inequity within Boston is stark: Fairmount Station costs $90/month; Hyde Park Station, half a mile away, costs $214/month. The city is advocating for Zone 1A fares at all city stations.
In 2024, the MBTA also launched Income-Eligible Reduced Fares — approximately half-price fares for residents enrolled in SNAP, MassHealth, and similar programs. Average savings: $720/year per eligible household.
Continue & ScaleCore Connected Bikeway Network (Boston Green Links): A plan to create safe, connected bike routes linking all neighborhoods to greenways, parks, and transit, building on the East Boston Greenway and Southwest Corridor.
Vision Zero — Boston’s strategy to eliminate traffic fatalities by 2030 — is a prerequisite for mode shift. If people don’t feel safe biking, they won’t. Projects include Safer Corridors (redesigning major 4-lane roads for protected bike lanes + bus lanes) and Safety Surge (speed humps, raised crosswalks, curb extensions in residential neighborhoods).
E-bike vouchers: The city offers discounts on e-bike purchases to make them accessible to lower-income residents. Free Learn-to-Bike programs and repair clinics are also available.
Open Streets: Temporary street closures creating car-free public space. Expanded citywide under Mayor Wu since 2022. Newbury Street draws 10,000+ per event.
EV charging goal: Every Boston resident within a 5-minute walk of a public EV charging station by 2030. Many residents lack home charging (“garage orphans”) — renters in apartments without parking especially. The city is expanding curbside and parking lot charging.
BPS school buses: 750 buses serve 200+ Boston schools. By end of 2025-26 school year, 15% will be electric, 65% propane. Electric buses eliminate diesel exhaust near schools — a significant public health benefit for children with asthma. BPS will continue expanding.
Freight/delivery: Delivery vehicles could be up to 36% more numerous on Boston streets by 2030 (MAPC analysis). The city is developing a Sustainable Urban Logistics Plan in 2026 to reduce freight emissions and reduce congestion.
Multilingual EV education: The city will expand resources in multiple languages and partner with community organizations, addressing the information barrier that disproportionately limits EV adoption in communities of color.
Trains, Bikes & Bus — Bolder PathTrue protected bike lanes, not paint — and rethinking EV chargingOn bike lanes: The plan mentions “protected bike lanes” and the Core Connected Bikeway Network — but in Boston, “protected” has often meant plastic flex posts or painted lines that disappear under snow, get blocked by delivery trucks, and offer no real physical protection. What residents actually asked for in community sessions: “Fewer cars, safer streets.” Real protection means raised cycle tracks separated by a physical barrier or a parked-car buffer, with dedicated signal phases. That requires removing car lanes or parking — something this plan doesn’t commit to. There’s no standard in the plan for what “protected” means, and that matters.
- Require all new “protected” bike infrastructure to meet a physical separation standard (raised surface, concrete curb, or parking-protected layout)
- Set a minimum network connectivity threshold — isolated protected lanes don’t work; they need to form a complete network
- Commit to reallocation: new bike lanes come at the cost of car lanes or parking, not just new asphalt
On EV charging: The plan’s goal — every resident within a 5-minute walk of public EV charging by 2030 — is essentially a curbside charger program. This has real problems: curbside chargers incentivize car ownership by making street parking more valuable, they conflict with pedestrian access and snow clearing, and they create long-term maintenance liability on already-crumbling sidewalks. A better model:
- Charging hubs in parking garages, at transit stations (you charge your car while you ride the T), at supermarkets and employers — destination charging, not residence charging
- For people with driveways: enable home charging without city involvement (permit streamlining)
- For renters in apartment buildings: require landlords to install Level 2 outlets in parking areas if they have them — the split incentive problem again
- Don’t build charging infrastructure that assumes every Bostonian will own a car
Congestion pricing (charging to drive into the city) is labeled Evaluate & Explore — meaning the city is studying it, not committing to it. NYC implemented congestion pricing[25] (then had it delayed politically). Boston hasn’t made a commitment.
Fare-free bus routes 23/28/29 lose their ARPA funding in 2026. The city wants to make them permanently free but hasn’t identified a sustainable funding source. If the money isn’t found, these routes return to paid fares — hitting transit-dependent, lower-income riders hardest.
Heavy-duty vehicle electrification (delivery trucks, school buses beyond what BPS is doing) is hard because the technology is still expensive. The plan acknowledges this but doesn’t have a clear path to the 4,000 zero-emission truck target.
Trains, Bikes & Bus — Our takeA dedicated city transit fund or surcharge (on parking revenue, ride-hailing fees, or commercial parking lots) to fund permanent free transit on the highest-equity corridors. A committed congestion pricing study timeline with a legislative trigger if a threshold of driving is exceeded.
The power grid
Energy: Cleaning the electricity Boston runs on
About 28% of Boston’s emissions come from electricity used in buildings. Even if you switch to heat pumps, those heat pumps run on the grid. Cleaning the grid is essential — and the city doesn’t own the grid.
Boston Community Choice Electricity (BCCE)
City program buying renewable electricity in bulk for 200,000+ customers. Three tiers: Basic (competitive rates), Standard (local renewables), Green 100 (all renewables). Between 2021–2024, BCCE avoided nearly 200,000 metric tons of CO2. Most residents don’t know they’re enrolled or how to change tiers.
E1 · Continue & ScaleStreamlined solar permitting
Installing rooftop solar in Boston currently requires navigating a complex permitting process. The city will streamline this — reducing paperwork and time — to accelerate adoption. A parallel effort makes it easier for building owners to access Renewable Energy Certificates (RECs) for BERDO compliance through the new REC BERDO Connector Program (launched 2026).
E1 · Continue & ScaleThermal energy networks
Rather than every building having a gas boiler, district-scale thermal networks use underground pipes to share heat from ground, water bodies, or waste heat. Can be up to 5x more efficient than conventional gas boilers. The city is funding studies on using Boston Harbor and subsurface sources as heat reservoirs. Franklin Field geothermal (BHA) is the first real-world test.
E3 · StartBattery storage and grid safety
Battery energy storage systems (BESS) help stabilize the grid as more renewable energy comes online. The city is developing a coordinated safety framework and consolidated permitting process for small clean energy and storage projects (target: end of 2026). Eversource projects electricity demand in Boston will grow 33% by 2033 — new substations and grid upgrades are planned.
E2 · Continue & ScaleTrains, Bikes & Bus — Bolder PathFrom buying renewable credits to actually generating power — and the case for public energyBCCE is aggregated purchasing, not generation. Boston Community Choice Electricity buys Renewable Energy Certificates from existing renewable projects. It doesn’t build wind turbines or solar panels. It doesn’t create local generating capacity. And it still runs through Eversource’s infrastructure. This is better than nothing — but it’s not the same as the city owning and operating clean energy generation.
What the city could own and generate:
- Solar on every city-owned rooftop: Boston has hundreds of public buildings — schools, firehouses, libraries, community centers, city hall. Rooftop solar on all of them would generate revenue, reduce municipal electricity costs, demonstrate leadership, and create local green jobs. The plan mentions “evaluate municipal rooftop space for solar potential” — that’s too slow. This should be a committed capital program.
- Community solar for renters: Most Boston renters can’t put solar on their roofs. Community solar programs (shared arrays on larger buildings or open land, with credits on utility bills for participants) are the only realistic path. The plan mentions this as something to “explore in the Energy Plan” — it should be a launched program.
- Offshore wind equity stake: Massachusetts has major offshore wind development underway. Boston could push for a community benefit agreement or equity ownership stake in regional offshore wind — creating a revenue stream for the city and ensuring lower rates for residents rather than just profits for private developers.
- Harbor and river thermal energy: The thermal network studies (using the Charles River, Mystic River, Boston Harbor as heat reservoirs) are genuinely promising and underpublicized. This is Boston-specific, locally owned, and operates more like a public utility than a private one. The Franklin Field geothermal pilot is the right model.
On public power: Cities like Burlington VT, Austin TX, and Los Angeles operate their own municipal electric utilities. They’ve decarbonized faster than comparable investor-owned utility areas, kept rates lower, and made direct democratic investments in renewables. Massachusetts law would require significant changes to allow a Boston municipal utility — but Boston could advocate at the state level, beginning by documenting what Eversource’s monopoly costs residents. The predatory third-party electricity supplier problem ($394K lost in a single month in lower-income neighborhoods) is partly a symptom of privatized energy with inadequate consumer protection. A genuinely public energy system — where rate decisions are accountable to voters, not shareholders — would structurally address this.
The most important levers — what goes on the New England grid, how utilities invest, how fast offshore wind gets built — are controlled by Eversource, National Grid, ISO-NE, and the state Department of Public Utilities. Boston can advocate, BCCE can purchase renewable RECs, but the city can’t unilaterally clean the grid.
Gas infrastructure: Every year, National Grid files a Gas System Enhancement Plan for pipe repairs and replacements. The city wants to advocate for strategic decommissioning of the gas system rather than just replacing old pipes. But National Grid ratepayers — not just in Boston — are funding continued gas infrastructure investment. This is a state-level fight Boston can influence but can’t win alone.
Trains, Bikes & Bus — Our takeA city ordinance prohibiting enrollment in third-party electricity supply (several Massachusetts communities are pursuing this), active support for a Massachusetts ban on new gas connections in new buildings (as some other states have done), and stronger advocacy at the DPU for Eversource to accelerate grid electrification in Boston’s Environmental Justice neighborhoods first.
Resilience · Heat
Extreme heat: Protecting a city that wasn’t built for 100°F summers
Even if Boston cuts all its emissions tomorrow, heat from past global warming is already locked in. Protecting people from heat they’re already experiencing — and heat that will keep coming — is a parallel urgent task.
Citywide average tree canopy: 27%. But Dorchester, East Boston, and Mission Hill have less than 20%, while wealthier neighborhoods have significantly more. The 2030 target is +0.5% citywide average — with planting priority in under-canopied neighborhoods. By 2040: no neighborhood below 25%. By 2050: 30% minimum everywhere, 35% citywide average.
Strategies include: tree planting on public streets and parks, the Boston Tree Alliance for private property canopy expansion, and improved growing conditions (soil volumes, permeable paving around roots, coordination between departments).
The plan is honest about one problem: public tree gains have been offset by private tree removals. The city is exploring stronger tree preservation requirements for private properties during development and infrastructure projects.
Goal: 100% of Boston residents within a 10-minute walk of a public cooling facility — pools, splash pads, library branches, or Boston Centers for Youth and Families.
The city will also support community resilience hubs — local organizations (community centers, faith institutions, nonprofits) serving as neighborhood cooling and resource centers. A toolkit for establishing hubs is being developed, with community-based organizations as leads rather than city-run facilities alone. This addresses the concern raised by elderly residents: they may not be able to travel to a designated cooling center.
For private spaces serving vulnerable populations (schools, childcare centers), the city will provide technical support to improve indoor cooling — but this is Continue & Scale, not mandated.
In August 2025, Boston passed an ordinance ensuring employees and contractors are protected from heat-related illness — requiring water, shade, and rest breaks above certain temperatures. Implementation plan to be finalized by Summer 2026. This is one of the few places in the plan where there’s an actual new legal protection, not just a program or study.
The city is also Evaluate & Exploreing advocacy for maximum indoor temperature standards — a law that would require landlords to keep apartments below a maximum temperature in summer, similar to existing minimum heating requirements in winter. This is a state-level action Boston can advocate for but not unilaterally enact.
Strategy H5 embeds heat mitigation into Boston’s development review (Article 80). New buildings and streetscapes must incorporate: tree canopy, cool roofs (reflective surfaces that absorb less heat), shade structures, and permeable surfaces. This is labeled Evaluate & Explore — not yet mandated, being studied for implementation.
The city is also working with MAPC to pilot cool roof programs regionally — spreading the approach across metro Boston where the city’s influence on private development is limited.
Resilience · Stormwater & Inland Flooding
Flooding from rain: Green sponges, smarter streets, basement apartment pilots
Boston’s combined sewer system was built for a smaller city. When it rains hard today, stormwater overwhelms it — causing overflows, basement flooding, and street inundation. Green infrastructure is the main tool.
Traditional (“gray”) infrastructure means larger pipes and storage chambers. Green infrastructure uses plants, soil, and permeable materials to absorb rainwater where it falls — cheaper, multifunctional (also reduces heat, improves air quality, supports biodiversity), and more equitable when installed in flood-vulnerable neighborhoods.
- Rain gardens: Planted depressions that collect and filter runoff from rooftops and streets
- Bioswales: Vegetated channels along streets that slow, absorb, and filter water
- Permeable pavement: Porous surfaces in parking lots and sidewalks that let water soak in
- Green roofs: Vegetation that absorbs rain before it runs off
- Tree trenches: Extended soil volumes under streets that allow tree roots and water to spread
The BWSC launched a stormwater grant program in 2024 offering up to $8,000 to property owners for runoff-reducing projects. A citywide Green Infrastructure Standard requiring GI in all major municipal projects is being developed (Start).
A new citywide inundation model (updating from the 2015 model) is being developed by BWSC with Woods Hole Oceanographic Institution — expected by 2027. This will identify where flooding is worst and guide where to invest first, feeding into the 2028 Capital Improvement Plan.
There are roughly 20,000 basement-level housing units in Boston. About 28% of them are in the Coastal Flood Resilience Overlay District. Basement apartments are often the most affordable housing in triple-deckers and small multifamily buildings — and among the most flood-vulnerable.
The city will launch a pilot in 2026 focused on Dorchester — targeting the most flood-at-risk basement units for targeted retrofits (elevating electrical panels, improving drainage, sealing penetrations). Results will inform a citywide strategy. This is new and concrete — but it’s a pilot for a problem affecting 20,000 units.
Start
Strategy S2 includes creating a new inland flood resilience overlay zone — a zoning tool complementing the existing coastal flood zoning. Using the updated BWSC inundation model, high-risk inland areas will be identified and new building standards applied. Community input will shape its design. Target adoption: 2030. This means buildings in high-risk inland areas would face design requirements for flood resilience — not just coastal areas.
Start
Resilience · Coastal Flooding
Sea level rise and coastal storms: Long timelines, massive costs, complex ownership
The hardest climate challenge Boston faces. Sea levels are rising faster on the East Coast than the global average. The infrastructure needed to protect the city costs billions — and the city doesn’t own most of its coastline.
The most important long-term coastal project: the Coastal Storm Risk Management (CSRM) Study, a partnership with the US Army Corps of Engineers. This study designs large-scale coastal protection projects eligible for federal cost-sharing. The city and Corps are engaging communities now to shape recommendations.
Timeline: Deliver study recommendations to Congress by Spring 2028. Then negotiate a Design Agreement by 2030 to begin the preconstruction and engineering phase. Federal appropriation and construction would follow — meaning major infrastructure is likely a 2030s–2040s project.
Continue & Scale
While the Army Corps study unfolds, the city is completing smaller, faster infrastructure to block the most dangerous near-term flood pathways in all five coastal neighborhoods: Charlestown, Downtown/North End, East Boston, South Boston, and Dorchester. These projects protect against flooding that’s already happening under current sea levels.
The city is also developing deployable flood protection — portable flood walls and gates that can be installed before storms, protecting specific blocks while permanent infrastructure is built. The Office of Emergency Management will coordinate deployment with property owners.
Continue & Scale
The city is applying to join FEMA’s Community Rating System (CRS) by 2030. CRS rewards communities with strong floodplain management by discounting residents’ flood insurance premiums. Even a modest CRS rating can save homeowners in flood zones hundreds of dollars per year.
The city will also work with community groups to increase flood insurance awareness among at-risk households — because many flood-zone residents remain uninsured and face financial ruin when flooding hits.
Start
Any new development or major renovation in coastal flood zones must meet CFROD standards: buildings must be elevated, use flood-resistant materials, and be designed for future sea levels — not just today’s. Updated in 2024 to cover more properties. The city will continue refining through 2030 as flood modeling improves.
The metric: tracking what percentage of development in the overlay zone is in compliance. Goal is 100%.
The city’s own Resilience Revenue Raising Study (Starting 2027) will assess the full cost of major coastal adaptation and identify funding mechanisms. A Coastal Resilience Financing Blueprint is planned for release in 2027. This means the city doesn’t yet have a funded plan for the most expensive pieces of coastal protection.
Protection from the flooding Boston will face by 2070 will cost the city and its partners multiple billions of dollars. The Army Corps can provide federal cost-sharing for projects it approves — but that process takes 10–15 years, Congress still has to appropriate the money, and Boston would owe a local match.
Trains, Bikes & Bus — Our takeA dedicated coastal resilience bond backed by city revenue, a state-level coastal resilience fund modeled on California’s Flood Control District model, and explicit anti-displacement protections tied to every coastal protection project so that raising land value through flood protection doesn’t displace existing residents.
Cross-hazard · Food
Food: Urban agriculture, food recovery, and a resilient local food system
Climate change disrupts food supply chains. Extreme heat and flooding threaten local growing. And food waste itself generates greenhouse gases. The plan includes a set of strategies around food that often gets overlooked.
Food Forests and Urban Agriculture
Boston has 13 food forests — community spaces growing edible plants — and is expanding through the Grassroots Program. Urban farms, community gardens, and food forests provide fresh local food in food-insecure neighborhoods while also cooling heat islands, managing stormwater, and building community. More land acquisitions planned in under-served areas.
X6 · Continue & ScaleFood Recovery
Surplus food from restaurants and institutions goes to waste — and to landfills, where it generates methane. The city is scaling coordination across Boston’s food recovery system, providing technical assistance and shared infrastructure so surplus food reaches people in need instead. Also supporting the curbside food scraps composting program, which has doubled year-over-year.
X5 · Continue & ScaleGood Food Purchasing Program
Boston passed the Good Food Standards purchasing ordinance in 2019. Boston Public Schools implements the Good Food Purchasing Program under this law, prioritizing local, sustainable, fair-labor food sourcing in school meals. This builds local food system resilience while reducing the emissions footprint of school food. The city is assessing opportunities to expand this framework.
X6 · Continue & ScaleFood System Resilience Plan
Boston will strengthen the regional food system’s resilience to climate disruption — extreme weather can shut down supply chains that Boston’s food system depends on. The plan will address emergency food access, urban agriculture, and distribution resilience. Based on ICIC Resilient Food Systems framework.
X6 · StartCross-hazard · Emergency preparedness
Community resilience: preparing neighborhoods for when things go wrong
No matter how much the city invests in prevention, emergencies will happen. This section covers how the city is preparing communities to weather climate emergencies — heat waves, flooding, and major storms.
Community Emergency Response Teams (CERTs)
CERT volunteers are trained in emergency response, first aid, disaster preparedness, and community coordination. The 2030 goal: CERTs in every Boston neighborhood. Currently at partial coverage. The city will expand training and outreach, with a climate justice lens on making sure higher-risk neighborhoods aren’t left without teams.
X2 · Continue & ScaleAlert Boston
Alert Boston is the city’s emergency notification system — text, email, and phone alerts for major emergencies. The Office of Emergency Management will improve how this system communicates specific guidance for heat events and localized flooding, rather than generic alerts. Enrollment campaigns will target under-enrolled neighborhoods.
X2 · Continue & ScaleCommunity Resilience Hubs
Rather than relying only on city-run cooling centers, the city is supporting community-based organizations — churches, nonprofits, community centers — to serve as local resilience hubs: cooling in summer, emergency resources in storms, coordination before and after disasters. A toolkit and funding model is being developed by 2027.
X2 · StartClimate Sensor Network
The city is expanding a network of sensors tracking flooding, air quality, and localized temperature — in partnership with universities and private partners. A website sharing this data (with privacy protections) will launch by 2027, enabling community groups and researchers to understand real-time climate conditions across neighborhoods.
X1 · Continue & ScaleCross-cutting
Climate justice: who gets helped, and how
Climate change doesn’t hit everyone equally. This plan is explicit that addressing it means also addressing decades of inequitable investment, pollution siting, and exclusion from decision-making.
A Healthy City
Climate work will improve health and quality of life for all — affordable access to housing, renewable energy, transit, and jobs.
A Fair & Inclusive City
Benefits and burdens must be distributed equitably. Acknowledges history: redlining, urban renewal, exclusionary zoning.
A Care-Full City
Climate work should promote healing, community resilience, and connection — not just technical fixes.
A Shared City
Local knowledge and cultural practices matter, including from Indigenous communities. Co-creation, not top-down planning.
A Green City
Boston shares its land with nature. Climate work should respect and enhance connections to urban ecosystems.
A new mapping tool showing Boston’s “climate justice neighborhoods” — areas at the intersection of multiple social, economic, health, and environmental vulnerabilities. It will guide where climate investment is most needed, help track whether things are improving over time, and be updated regularly. Expected 2027.
Yes — and the plan addresses this directly. Green infrastructure can raise property values and displace residents (called “green gentrification”). Solar and EVs have mainly benefited wealthier white households. Coastal protection can prioritize high-value real estate over vulnerable communities if not designed carefully.
The plan commits to: weatherization tied to affordability protections, tree planting priority in under-canopied neighborhoods, coastal protection designed to protect existing residents not just property values, and transit improvements that serve transit-dependent communities. Whether these commitments hold depends on implementation.
A permanent advisory body giving residents a direct channel to the city as the plan is implemented. Allows community members to voice concerns, share knowledge, and influence decisions — while giving the city a mechanism to ground-truth its efforts. Specific terms, membership, and appointment process are not yet detailed in the plan.
Economic opportunity
Jobs and workforce: The green economy has to be for everyone
Every heat pump installed, every building retrofitted, every tree planted requires workers. The plan treats this as a major economic opportunity — especially for communities historically excluded from well-paying technical careers.
BCJA brings together 30+ stakeholders — employers, training providers, community partners, service agencies — to create training pathways in coastal and climate resilience occupations. Funded by a $9.8M NOAA Climate-Ready Workforce grant.[24] Goal: 645 people trained, 484 placed in 1,200+ family-sustaining jobs at 13 committed employers, by August 2028.
The plan calls for expanding BCJA to additional sectors like building decarbonization, and partnering with schools from high school to higher education.
Continue & Scale
PowerCorpsBOS is a 10-month paid program for young adults 18–30. Since its 2022 founding: 127 participants across 5 cohorts, ~75% graduation rate, and in the most recent cohort 87% of graduates entered a green job directly after completing the program. A new pathway with BWSC for water utilities/stormwater management is being developed.
The Summer 2025 pilot of the Youth Climate Corps employed 200+ young people ages 14–24 in paid climate-related work with at least 30 hours of hands-on experience, mentorship, and career exposure. Future cycles will strengthen the pipeline from youth programs to long-term careers.
Continue & Scale
Strategy W2 specifically focuses on removing barriers that prevent people from lower-income backgrounds from accessing training programs: language access (multilingual materials and instruction), childcare support, transportation assistance, and reconsidering how background checks are used in green job hiring. This is Evaluate & Explore — the city is committed to addressing these but hasn’t specified the mechanisms yet.
Strategy W3 uses the city’s procurement power to set labor standards. Project Labor Agreements (PLAs) require union wages, benefits, and labor standards on major city construction projects — ensuring climate investments create good jobs, not just any jobs. The city is also exploring how to encourage BERDO-covered building owners to adopt strong labor standards when hiring for retrofits. BERDO combined with small building retrofits could generate more than 40,000 job-years over five years (roughly 8,000/year), accounting for 25–47% of Boston’s construction employment by 2030.
Continue & Scale
Paying for all of it
Funding and financing: Where the money comes from — and where it doesn’t yet
Climate action at scale costs billions. Boston is threading together federal grants, state programs, city budget, private investment, and new mechanisms being studied. The picture is complicated and some parts are uncertain.
Starting Fiscal Year 2027, the city will integrate climate goals into its annual budget process — tracking how municipal spending advances emissions reduction and resilience. An annual climate budgeting report will be published alongside the regular city budget. This is Start — new for Boston, and a significant accountability mechanism if done rigorously.
When BERDO-covered buildings can’t meet their emissions limits, they pay into the Equitable Emissions Investment Fund (EEIF). This fund awards grants to nonprofits for building decarbonization projects in Environmental Justice communities. To date: 7 grants totaling $1.5M. Example: Fenway Forward received $245,250 for upgrading Burbank Gardens, a 52-unit affordable building — reducing emissions by nearly 40,000 kg/year while improving air quality for residents.
The city and Green Ribbon Commission will release a Funding and Financing Blueprint for Coastal Resilience in 2027 — assessing the full cost of major adaptation projects and identifying funding mechanisms. Key questions: How does Boston raise the local match for Army Corps projects? What new revenue tools (bonds, surcharges, special districts) make sense? Can philanthropic capital be deployed at scale?
The plan acknowledges this is unresolved. Coastal protection from 2050-level flooding costs billions — this is the single biggest financial gap in the plan.
Boston has roughly 70,000 small buildings. Decarbonizing them all requires financing tools that don’t yet exist at scale. The city is participating in a Boston Foundation working group to explore a catalytic funding mechanism — potentially a revolving loan fund or grant program that addresses the deferred maintenance and pre-weatherization barriers (like knob-and-tube wiring) that prevent many small building owners from qualifying for existing programs.
Start
trainsbikesbus.com editorial
Our Bolder Path: What stronger climate policy would do
Where the plan is cautious or silent, here’s what research and peer-city experience suggests would be more effective.
This plan has no housing density section — which is a significant omission. Urban density research consistently shows that people in dense, walkable, transit-served neighborhoods have dramatically lower per-capita carbon footprints than suburban or low-density residents. More housing in Boston = shorter regional commutes = lower emissions.
Boston’s zoning still allows single-family homes in many neighborhoods. Single-family homes have the highest energy use per person, require the most land, and are least compatible with transit. The triple-decker — Boston’s traditional multifamily housing form — is actually a climate-optimal building type: shared walls, walkable neighborhoods, efficient footprint.
What this plan could say but doesn’t:
- Eliminate single-family-only zoning across all of Boston (the MA MBTA Communities Act[27] only requires multifamily near transit stations)
- Raise height limits in transit-accessible neighborhoods to enable more floors per building
- Eliminate minimum parking requirements in areas served by frequent transit — this reduces housing costs, reduces car ownership, and improves walkability simultaneously
- Tie development bonuses (extra height, reduced permitting timelines) to all-electric construction and certified energy performance
Community sessions explicitly ranked “protected bike lanes and fewer cars” among the highest priorities. But the plan doesn’t define what “protected” means — and in Boston, “protected” has often meant plastic flex posts or painted lines that offer minimal actual separation from car traffic, disappear under winter snow, and get parked on by delivery trucks.
True physical protection means:
- Raised cycle tracks elevated above the roadway surface
- Parking-protected lanes where parked cars act as a physical buffer between bikes and moving traffic
- Dedicated signal phases so cyclists don’t mix with turning vehicles
- Continuous networks — isolated protected segments don’t work; people need connected routes
All of this requires reallocation: space currently used for car lanes or parking becomes bike infrastructure. The plan doesn’t commit to this tradeoff. Without removing something for cars, you can’t build genuinely protected infrastructure in most of Boston’s street right-of-way.
The plan’s stated goal — every resident within a 5-minute walk of a public EV charger by 2030 — implies a dense network of curbside chargers. This has real problems that the plan doesn’t acknowledge:
- Curbside chargers incentivize car ownership. If every block has an EV charger, parking a car on the street becomes more valuable, not less.
- They compete with pedestrian space — charging cables, bollards, and charger cabinets take up sidewalk area that’s already inadequate in many neighborhoods.
- They create maintenance liability on already-crumbling Boston sidewalks and roads — and digging up sidewalks for electrical conduit makes road repair and resurfacing more expensive.
A better charging strategy:
- Charging hubs at transit stations (charge your car while you ride the T), parking garages, supermarkets, and major employers — destination charging model
- Home charging for people who have driveways — streamline permitting
- Mandate in-building charging for new multifamily developments with parking (already partly done) and require landlords to enable Level 2 charging in existing parking areas
- The goal of the EV transition should be decarbonizing vehicles that continue to exist — not making it easier to own a car in a dense city
The plan’s energy strategy is primarily about purchasing renewable energy and advocating with Eversource — not generating power. Boston Community Choice Electricity buys Renewable Energy Certificates, which fund existing renewable projects but don’t build new local capacity or give the city any ownership of generation assets.
What city-owned generation could look like:
- Rooftop solar on every city-owned building: schools, firehouses, libraries, community centers, city hall. Hundreds of buildings. Revenue from net metering, reduced electricity costs, visible public infrastructure.
- Community solar programs: shared arrays (on large flat rooftops, brownfields, parking garages) where renters without rooftop access can subscribe and receive bill credits. This is the only realistic solar path for the 65% of Bostonians who rent.
- Offshore wind equity: Massachusetts has major offshore wind development underway. Boston could push for community benefit agreements or a city/regional equity stake, ensuring profits flow back to residents rather than purely to private developers.
- Thermal energy from the harbor and rivers: The city’s own studies are exploring this. Water bodies hold enormous thermal energy. This is Boston-specific, locally controllable infrastructure — more like a public utility than a private market transaction.
On public power: Burlington VT (100% renewable since 2014)[26][26], Austin TX (Austin Energy), and Los Angeles (LADWP) operate municipal electric utilities. They’ve decarbonized faster, kept rates lower, and have democratic accountability for investment decisions. Establishing a Boston municipal utility would require state legislation — but beginning that advocacy, and documenting the cost of Eversource’s monopoly, is within the city’s power. The $394K lost to predatory third-party suppliers in one month in lower-income neighborhoods is a direct consequence of privatized energy with inadequate consumer protection.
This plan can’t tell the MBTA what to do. The city can advocate, coordinate, and fund bus priority on city streets — but the T is a state agency. Mode shift targets (30% shift to transit/bike/walk) are nearly impossible to hit without significant MBTA frequency improvements. You can’t shift people to buses that come every 20 minutes.
What would actually move the needle:
- All-day frequent service on rapid transit lines — 10 minutes or better on all lines, all day, seven days a week. The T currently runs adequate peak-hour service but drops off dramatically off-peak, evenings, and weekends.
- Real Bus Rapid Transit on major corridors (Blue Hill Ave, Washington St, the Fairmount corridor) — dedicated lanes, off-board fare payment, level boarding — not just signal priority
- Free transit citywide — not just 3 routes. Kansas City, Tallinn Estonia, Luxembourg have gone fare-free. The fare revenue (~$700M/year across MBTA) is less than 20% of the MBTA budget; the rest is subsidized anyway. Eliminating fares would be the most equitable mode-shift tool available.
- Less parking, not just more EV charging: removing parking spaces near transit stations (or converting them to housing) makes it more convenient to take transit and less convenient to drive
The plan’s transit advocacy is mostly “work with the MBTA” and “advocate for Zone 1A fares.” That’s realistic given the city’s authority — but it should be accompanied by Boston taking a much stronger public position on state MBTA funding, because mode shift is impossible without it.
Accountability
How will we know if any of this is working?
The plan is only as good as its follow-through. Here’s how accountability is built in — and where it’s still developing.
- Now2026Plan launch + 2026–2027 Implementation Roadmap releasedSpecifies which actions happen first and who’s responsible. Released alongside the plan at boston.gov/climate-action-plan.
- 20272027Climate Justice Index + Coastal Resilience Financing BlueprintNew mapping tool showing most climate-vulnerable neighborhoods, and a funded plan for coastal protection — both critical for the next phase of implementation.
- 20282028Army Corps CSRM study delivered to Congress + Fairmount Line electrifiedTwo major milestones: coastal protection study enabling federal funding, and cleaner commuter rail serving Dorchester, Mattapan, and Hyde Park.
- 20302030The big check-in50% emissions reduction? 10,000 coastal residents protected? Tree canopy up? Heat ER visits down 25%? 100% of neighborhoods with CERT teams? All 13 strategies and 12 targets assessed.
- 20502050Carbon neutrality goalNet-zero greenhouse gas emissions across the entire city. 2030 is the crucial midpoint. Missing it makes 2050 much harder.
The plan is direct: existing policies alone are projected to reach ~48% by 2030. This plan’s new strategies close the gap to 50%. But several of those strategies depend on: state action on MassSave and utility regulation, MBTA improvements the city doesn’t control, federal funding that is now partly rescinded, and private sector investment that must happen at scale.
Additionally, many strategies in the plan are Evaluate & Explore — not committed actions. If the studies find the approaches aren’t feasible or funding isn’t there, those strategies won’t deliver. The accountability mechanism (annual reporting, the dashboard, the Advisory Committee) is real — but the question is whether there will be political will to make hard decisions when progress is off track.
Trains, Bikes & Bus — Our takeWatch the 2027 Roadmap update to see whether “Evaluate & Explore” items get converted to committed actions — especially for small buildings, renters, and congestion pricing. Watch whether the Coastal Resilience Financing Blueprint actually identifies funded mechanisms or just describes the problem. And watch whether the climate budgeting report holds the city’s own spending to climate standards.
Your role
What can you actually do?
The plan is explicit: City Hall alone can’t do this. Here’s how to plug in as a resident, renter, homeowner, business, or community organizer.
Upgrade your home
Free weatherization assessments and rebates for heat pump installations through Boston Energy Saver and MassSave.
Boston Energy Saver →Switch to clean electricity
Boston Community Choice Electricity gives you cleaner power — often at lower cost than default Eversource supply. Three tiers available.
BCCE Program →Track city progress
The public dashboard shows how Boston is doing on every metric, updated annually, broken down by neighborhood.
CAP Dashboard →Join green workforce training
PowerCorpsBOS and the Youth Climate Corps offer paid training into green careers for Boston residents.
Worker Empowerment →Sign up for Alert Boston
Get notified about heat emergencies, flooding, and other climate-related hazards in your neighborhood.
Alert Boston →Read the full plan
The official 110-page plan is on Boston.gov, with the full Implementation Roadmap.
Full Plan →Data & Sources
References
All statistics cited in this guide are sourced from official city documents, government data, and published reports. Superscripts throughout the text link to the numbered entries below. Sections marked Trains, Bikes & Bus — Our Take cite additional independent sources.
City of Boston — primary plans & programs
External fact-checking sources
These are independent sources we used to verify or correct specific claims in the official plan — things like weather records, transit data, and government reports. Where we found a discrepancy with the plan’s own text, we note it explicitly.
Trains, Bikes & Bus — Bolder Path editorial sources
These sources inform the analysis in our Bolder Path sections — the parts of this guide that go beyond what the city’s plan proposes. They are not cited in the official plan. They represent peer-city examples, research findings, and policy models that we believe Boston should consider.