Investing & land · Massachusetts

Buying land to build in Massachusetts: a developer's due-diligence checklist

By Damon Amato, MA real estate salesperson and developer · Updated 2026-11-09 · 10 min read

Short answer

Before you buy land in Massachusetts, confirm in writing what zoning allows on that exact lot, how it will handle wastewater (town sewer, or a septic system that passes Title 5 soil testing), where wetlands and flood zones are, whether the land is enrolled in Chapter 61, 61A or 61B, and what access and utilities will cost. Make your offer contingent on the tests and approvals you need, so you aren't buying the land before you know what you can build.

I've bought parcels other buyers had walked away from and taken them through zone changes, variances and site approvals, from a 15-lot overlay district in Newburyport to two sloped house lots in Northborough. The pattern is always the same: the deals that work are the ones where the hard questions were answered before the purchase, not after.

1. Zoning: what's allowed on this lot

Use, lot area, frontage and setbacks. Read the town's zoning bylaw and map for the district, then check the lot against each requirement. Frontage must usually be on a way that qualifies under local rules.
Older, undersized lots. Some lots created under earlier rules have protection under state law, but the protections are technical and depend on the lot's history and ownership. Get an attorney's opinion before relying on them.
Dividing land. A division where every lot has the required frontage on an existing qualifying way may be endorsed by the planning board as "approval not required" (ANR). A new road means a subdivision, with engineering, approvals and bonding.
Variances and special permits. Special permits are granted when a bylaw allows them and conditions are met. Variances are harder: state law requires a hardship tied to the soil, shape or topography of the land.
Zone changes. Possible, but they need a town meeting or city council vote. At Colby Farm Lane in Newburyport, a zone change and a new overlay district turned four lots on about two acres into 13 single-family and 2 duplex lots.

2. Wastewater: sewer or septic

Without town sewer, a new home needs a septic system designed under Title 5 of the State Environmental Code. That starts with deep observation holes and a percolation test witnessed by the local Board of Health. High groundwater, ledge or slow-draining soil can limit the house size, raise the cost or make a lot unbuildable, and many towns add stricter local rules. If sewer is available, confirm capacity, connection fees and any betterment charges.

3. Wetlands and conservation

Under the Wetlands Protection Act, work within 100 feet of a wetland resource area (the buffer zone) or within 200 feet of a perennial river or stream (the riverfront area) needs review by the local Conservation Commission, usually through a Notice of Intent and an Order of Conditions. Many towns have local wetland bylaws with additional setbacks. Hire a wetland scientist to flag boundaries early. On 75 Ridge Road in Northborough, wetlands and older cottages shaped a three-lot plan that took years to complete.

4. Flood zones and the coast

Look up the parcel on the FEMA Flood Map Service Center. In flood zones, the building code requires elevated construction, which changes design, cost and insurance. Coastal sites also involve coastal resource areas under the Wetlands Protection Act. At 18 North End Boulevard in Salisbury, the approved 11-townhouse plan followed several rounds of architecture that earlier buyers hadn't been able to get through.

5. Topography, ledge and drainage

Steep slopes, ledge and drainage problems don't always stop a project, but they move money. Driveway grades, retaining walls, stormwater design and blasting all show up in the budget. On 223–227 South Street in Northborough, it took more than 100 hours with engineers to make the grading work for two house lots.

6. Chapter 61, 61A and 61B land

Land enrolled in the forest (61), agricultural (61A) or recreation (61B) programs pays lower property taxes. If it's sold for another use, the city or town gets a right of first refusal: generally 120 days from a complete notice to match a bona fide offer, or to assign the right to a conservation organization. Conversion or rollback taxes may also apply. Check the assessor's records before you make an offer, and build the timeline into your agreement.

7. Title, survey and access

Order a title examination early: easements, rights of way, restrictions and old subdivision covenants can limit what you build.
Confirm legal access. A path on the ground isn't the same as a recorded right to use it.
Get a survey that shows boundaries, frontage, easements and wetland flags.
Registered (Land Court) land follows different recording procedures; your attorney will know.

8. Utilities

Ask the water department, electric utility and gas company what extending service to the lot would cost and how long it takes. Private wells need testing for yield and quality. Long utility runs can cost more than buyers expect.

9. Environmental history

Former gas stations, fuel tanks, fill and industrial uses can trigger cleanup responsibility under Massachusetts law (Chapter 21E). On commercial or formerly commercial land, a Phase I environmental site assessment is standard due diligence. At 114–118 Merrimack Street in Newburyport, a burned-down restaurant site that three earlier buyers couldn't permit, careful due diligence came before the purchase.

10. State rules that can add value

Accessory dwelling units. Since February 2, 2025, one ADU of up to 900 square feet (or half the main home's size, if smaller) is allowed by right on single-family lots in most Massachusetts communities, subject to reasonable local rules.
MBTA Communities. Communities served by the MBTA must have at least one district where multifamily housing is allowed by right. Check whether your parcel is in or near one.

11. Structure the offer to match the risk

Contingencies for perc and soil testing, wetland delineation, and the specific permits you need.
Enough time for hearings, with options to extend, and clear deposit terms.
Seller cooperation with applications, since many boards need the owner's signature.
A price that reflects the approval risk you're taking.

Common questions

How do I know if land is buildable in Massachusetts?

Check zoning (use, lot area, frontage, setbacks), wastewater (sewer, or a septic system that passes Title 5 soil testing), wetlands and flood zones, access, and title. Buy with contingencies until those are confirmed.

What is an ANR plan?

An "approval not required" plan divides land into lots that each have the required frontage on an existing qualifying way. The planning board endorses it without subdivision approval.

What is the Chapter 61 right of first refusal?

When land enrolled in Chapter 61, 61A or 61B is sold for another use, the city or town generally has 120 days from a complete notice to match the offer or assign that right.

Can I add an ADU to my lot in Massachusetts?

Since February 2, 2025, one accessory dwelling unit of up to 900 square feet, or half the main home's size if smaller, is allowed by right on single-family lots in most communities, subject to reasonable local rules.

Own land, or looking at a parcel?

Send me the address. I'll give you a first read on zoning, wastewater, wetlands and approval risk, and tell you what needs an engineer or attorney to confirm.

Talk through a land deal

Sources

Sources checked 2026-11-09. This guide is general information, not legal, tax or financial advice.