Buying Land in Massachusetts: Why the Town Runs Zoning, Not the County

Zoning is a town or city function everywhere in Massachusetts

Under the Massachusetts Zoning Act, MGL Chapter 40A, the authority to adopt a zoning ordinance or bylaw -- districts, permitted and conditional uses, dimensional requirements, special permits, and variances -- belongs to the city or town's legislative body (city council, or town meeting in most smaller towns). There is no county-level zoning anywhere in the Commonwealth. The permit-granting authority for special permits and variances is typically a local zoning board of appeals, and site-specific questions get answered by the town's building inspector or planning/zoning office, never a county planning department.

This matters more in Massachusetts than in most states because county government here is unusually thin to begin with. Between 1997 and 2000, the Legislature abolished the governments of eight of the Commonwealth's 14 counties -- Berkshire, Essex, Franklin, Hampden, Hampshire, Middlesex, Suffolk, and Worcester -- under MGL Chapter 34B. In those counties, the county government simply doesn't exist anymore; county functions like courts, sheriffs, and jails were transferred to the state, and the Registry of Deeds is now administered by the Secretary of the Commonwealth's office rather than a county. Six counties -- Barnstable, Bristol, Dukes, Nantucket, Norfolk, and Plymouth -- still have some form of county government, mostly clustered in the southeastern part of the state. But the distinction barely matters for a land buyer: even in a county that still exists on paper, Massachusetts counties have never had zoning authority. "Call the town" is correct everywhere in the state, abolished county or not.

Title 5 sets a real statewide septic standard -- but the transfer-inspection rule is about existing systems, not raw land

Massachusetts has a genuinely distinctive septic framework compared to most of the country. Title 5 of the State Environmental Code (310 CMR 15.000), administered by the Massachusetts Department of Environmental Protection (MassDEP), sets uniform statewide standards for siting, designing, constructing, inspecting, and upgrading on-site septic systems. Local Boards of Health are the permitting authority on the ground -- they witness perc tests and soil evaluations, review and approve system design plans, and issue the actual Disposal System Construction Permit -- but they're implementing a state-written rulebook, not writing their own from scratch, and some boards layer additional local requirements on top of the state minimum.

The part of Title 5 most people have heard of is its property-transfer inspection requirement, at 310 CMR 15.301: a septic system generally must be inspected within two years before title to the property it serves transfers (extendable to three years if the system has been pumped annually), with specific exemptions for certain inter-family transfers and for taking a mortgage or other security interest. This is the detail worth getting right for a land purchase: the rule requires inspecting an existing system serving the property, not the parcel itself. Vacant land with no septic system on it has nothing for an inspector to inspect, so the transfer-inspection requirement doesn't apply in that scenario. What does apply to vacant land is the ordinary new-construction path -- a certified soil evaluator performs a percolation test and soil evaluation witnessed by the local Board of Health, and the resulting design still has to meet Title 5's siting and construction standards before that Board issues a construction permit.

The Wetlands Protection Act is a statewide law, enforced by the town's Conservation Commission

The Massachusetts Wetlands Protection Act (MGL Chapter 131, Section 40), in place since 1972, is the other genuinely statewide layer to know about. It prohibits filling, excavating, or otherwise altering wetlands, floodplains, riverfront areas, and other protected resource areas -- regardless of who owns the land -- without a permit. MassDEP writes the implementing regulations (310 CMR 10.00), but enforcement on the ground runs through each town's Conservation Commission, a local board that holds a public hearing on a project and then issues an Order of Conditions approving it (often with mitigation conditions) or denying it.

For a land buyer, this means a parcel can be zoned exactly right and still face a separate, state-defined wetlands review the moment it includes -- or is adjacent to or within a defined buffer of -- a wetland, stream, pond, or floodplain. Many towns have also adopted their own local wetlands bylaws that go further than the state act, so the town Conservation Commission is the right first call for any parcel with water or wet ground on or near it, not an assumption based on the zoning map alone.

What this means for due diligence

On a Massachusetts parcel, confirm zoning, permitted uses, and any special permit or variance requirement with the specific town's building or zoning office -- there is no county-level zoning authority to fall back on, whether or not that county's government still exists. Separately, if the parcel is vacant and needs a new septic system, plan on a perc test and soil evaluation witnessed by the local Board of Health under Title 5, not a transfer inspection (that rule only applies to a system already in place). If any part of the parcel touches or sits near a wetland, stream, pond, or floodplain, check with the town Conservation Commission before assuming what you can clear or build -- the Wetlands Protection Act applies on top of zoning, not instead of it.