Massachusetts Community Preservation Act: What Homebuyers Need to Know

Most first-time buyers in Massachusetts hear about closing costs, deed excise taxes, and property tax rates. Fewer understand the Community Preservation Act (CPA) surcharge until they see their first property tax bill.

In over 180 Massachusetts communities, property owners pay a local surcharge on top of the standard property tax. The surcharge funds open space, historic preservation, affordable housing, and recreational land. It's not huge — typically 1% to 3% of the base tax bill — but it's permanent and it compounds as your assessed value rises.

If you're buying in a CPA-participating community, you should know what you're paying and what it's for.

What the Community Preservation Act Does

The Community Preservation Act (MGL Chapter 44B) was passed in 2000 and allows Massachusetts cities and towns to adopt a local surcharge on property tax bills to fund four categories of community investment:

1. Open space acquisition and preservation: Land protected from development, conservation restrictions on farmland, trails, and green space
2. Historic preservation: Restoration and preservation of historically significant structures and landscapes
3. Community housing: Creating and supporting affordable housing for low- and moderate-income residents
4. Outdoor recreation: Playgrounds, recreational trails, parks, and athletic facilities

Each participating municipality must spend at least 10% of annual CPA funds in each of the first three categories (open space, historic preservation, and community housing). The remaining funds can be allocated at the local Community Preservation Committee's discretion.

The state provides a matching grant to CPA municipalities from the Community Preservation Trust Fund, funded by fees collected at Registries of Deeds across the state. Match rates vary by year and by how many municipalities participate — in early years, state matches were dollar-for-dollar; as more communities joined, the per-municipality match has diluted. Communities that adopted CPA early tend to receive higher matching percentages.

How the Surcharge Is Calculated

When a town adopts CPA through a voter referendum, it selects a surcharge rate — typically between 1% and 3% of the annual property tax bill. Some communities adopted rates at the statutory maximum of 3%.

Crucially, the surcharge is calculated on the tax bill, not on the assessed value directly. And most CPA communities exempt the first $100,000 of assessed value from the surcharge calculation.

Example: A property assessed at $500,000 in a town with a $12.00 per $1,000 tax rate and a 2% CPA surcharge:

• Base assessed value: $500,000
• Less CPA exemption: $100,000
• Taxable value for CPA purposes: $400,000
• Base tax on $400,000 at $12.00/1,000: $4,800
• CPA surcharge at 2% of base tax: $4,800 × 0.02 = $96 annually

The CPA surcharge in this example adds $8 per month to property costs — noticeable but not dramatic. In higher-value properties or communities with higher CPA rates, the annual surcharge can reach $500 to $1,000 per year.

Which Communities Participate

As of 2026, more than 180 Massachusetts municipalities participate in CPA — roughly half of all cities and towns in the state. The program has seen broad adoption across both urban and rural communities.

Notable CPA participants in Greater Boston and surrounding areas include:

• Boston (3% surcharge)
• Cambridge (3%)
• Somerville (3%)
• Brookline (3%)
• Newton (3%)
• Arlington (3%)
• Lexington (3%)
• Concord (3%)

Cape Cod communities are particularly active CPA participants. Fifteen of the fifteen Cape Cod municipalities participate, with most at 3% — the statutory maximum. The Cape Cod surcharges contribute heavily to the region's open space and affordable housing funds, given the intense development pressure on the peninsula.

To determine whether a specific community participates and at what rate, check the Community Preservation Coalition's online database (communitypreservation.org), which maintains current participation status and surcharge rates for all Massachusetts municipalities.

Exemptions from the Surcharge

Several categories of property owners and properties are exempt from the CPA surcharge, or can apply for hardship exemptions:

Statutory exemptions:

• Low-income households (qualifying under the state's income threshold for property tax abatements)
• Low and moderate-income senior citizens (typically income threshold around $40,000-$60,000 depending on the community)

Most participants also exempt: The first $100,000 of assessed value, as described above.

If you're purchasing in a CPA community and your household income qualifies for low-income exemption from property taxes generally, verify whether the same exemption extends to the CPA surcharge — it typically does.

CPA and Affordable Housing: The Connection to First-Time Buyers

One of the three required spending categories is community housing — a minimum of 10% of CPA funds annually must go toward affordable housing initiatives. In many communities, this translates to:

• Down payment assistance grants or loans for income-qualified first-time buyers
• Rehabilitation grants for owner-occupants to repair or improve their homes
• Funding for affordable housing development by local nonprofits
• Acquisition of existing homes to be deed-restricted as affordable housing

This means that the CPA surcharge you pay as a homeowner partially funds housing assistance programs that may benefit future buyers in your community — and, in some communities, may have funded the affordable housing programs that helped previous buyers afford to buy at all.

Several Gateway Cities use CPA funds to supplement MassHousing's down payment assistance. Worcester's affordable housing programs, for example, draw partly from CPA-funded community housing reserves. Buyers who received assistance from these programs are effectively receiving the benefit of CPA surcharges paid by existing property owners.

What CPA Funds Have Built in Massachusetts

Since the program's inception, Massachusetts CPA communities have collectively spent over $3 billion in CPA funds. Across the state, this has resulted in:

• Protection of over 35,000 acres of open space
• Preservation of more than 7,000 historic resources
• Creation or rehabilitation of over 25,000 affordable housing units
• Construction and improvement of thousands of recreational facilities

For buyers in communities with strong CPA programs, the tangible benefits are visible: preserved farmland around residential neighborhoods, restored historic town halls, maintained recreational fields, and affordable housing that prevents the complete displacement of working-class residents from gentrifying areas.

Practical Implications for First-Time Buyers

When your real estate attorney performs a title search and reviews the Municipal Lien Certificate (MLC) for your property, they confirm that no outstanding charges — including back property taxes and the CPA surcharge — are owed against the property. The MLC also confirms the current tax rate structure, including the CPA surcharge.

Your lender calculates property tax escrow based on the total annual property tax bill including the CPA surcharge. If your lender's escrow estimate doesn't include the surcharge, contact them before closing — an understated escrow causes an escrow shortage and an increased monthly payment after the first year.

When comparing total housing costs across municipalities, factor in the CPA surcharge alongside base tax rates. A community with a higher base tax rate but no CPA participation may cost less annually than a community with a lower base rate but a 3% CPA surcharge at high assessed values.

The Massachusetts First-Time Home Buyer Guide includes a full breakdown of property tax mechanics — base rates by municipality, residential exemption values, CPA surcharge rates, and how to calculate your actual annual tax bill before you submit an offer on any property in the state.

Is CPA a Problem for First-Time Buyers?

The surcharge is rarely a decisive factor in purchase decisions — the absolute dollar amounts are modest relative to total housing costs in Massachusetts. But it's worth knowing:

• Whether your target community participates
• What the current surcharge rate is
• Whether you qualify for any income-based exemptions
• How the surcharge is projected to compound as your assessed value rises over time (most Massachusetts assessed values have risen significantly over the past decade)

The practical approach: when your attorney reviews the MLC and confirms the tax figures, verify that the CPA surcharge is included in the total tax figure being quoted to you. A few communities assess the surcharge as a separate line item on the tax bill rather than folding it into the base; others integrate it. Either way, the amount is disclosed — you just need to know to look for it.

See more Massachusetts guides →