Massachusetts Building Permits, Zoning & Septic by County

Massachusetts has a statewide building code, and all 14 counties are listed as requiring residential building permits.¹² Only 1 county is listed without county-wide zoning, but cities and towns adopt their own zoning.³⁴ Local boards of health administer septic permits within their authority under state environmental standards.⁵ Private-land RV living remains unconfirmed; tiny-house provisions apply conditionally in designated seasonal communities.⁶⁷

At a glance

Residential building permits: 14 counties required; 0 without a requirement; 0 with a limited requirement²⁸⁹
Zoning: 1 county listed without county-wide zoning; city and town zoning still matters³⁴
No building permit and no zoning: 0 counties listed with both¹⁰
Septic permits: Local health officers or boards of health administer permits within their authority; state minimum standards apply⁵
RV living: 0 counties with a confirmed private-land occupancy answer; ask the municipal zoning office⁶
Tiny homes: Conditional year-round housing provisions in designated seasonal communities⁷
Owner-builder: Home-improvement-contractor registration exemption, not a building-permit exemption¹¹
Private wells: Certified well drillers; cities and towns may require a site permit¹²

Who to call

Codes & inspections

Board of Building Regulations and Standards

State building-code and construction supervisor licensing questions

(617) 727-3200

BBRS-MA@mass.gov

One Federal Street Suite 600 Boston, MA 02110-2012

Septic permits

MassDEP Septic Systems / Title 5 Contact Information

State septic-system guidance and Title 5 questions

DEP.Title5@mass.gov

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Which Massachusetts counties don't require a building permit?

Massachusetts has 0 counties listed without a residential building-permit requirement, 0 with a limited requirement and 14 with a requirement.⁸⁹² County comparisons concern unincorporated land; city and town requirements need a separate address-specific answer.²¹ Massachusetts local inspectors enforce the statewide building code within their city or town, subject to statutory exceptions.¹

Massachusetts exempts people building their own home or personally doing renovations from home-improvement-contractor registration; that exemption does not remove building permits, inspections or other applicable licensing requirements.¹¹ See the Massachusetts owner-builder overview for that distinction.¹¹ The Board of Building Regulations and Standards handles statewide code and construction supervisor licensing questions.¹³ Ask the municipal building inspector for the application, fee schedule and inspection requirements for the proposed home.

Which Massachusetts counties have no zoning?

Only 1 Massachusetts county, Bristol County, is listed without county-wide zoning; 13 counties are listed with zoning.³¹⁴ Massachusetts zoning ordinances and bylaws are adopted by cities and towns, so a county-wide zoning answer cannot establish whether a particular parcel permits a home, RV or agricultural use.⁴

Use the Massachusetts no-zoning overview as a starting point, then ask the municipal planning or zoning office for the parcel district and applicable dimensional rules.³ Massachusetts municipalities must show districts on an identifiable zoning map and keep their zoning ordinance or bylaw available for inspection.¹⁵ Massachusetts zoning law bars regulation of the interior area of a single-family residential building, but state building-code requirements remain applicable.¹⁶

Who issues septic permits in Massachusetts?

For Massachusetts residential sewage systems covered by the reviewed statute, state environmental-code minimum standards apply and local health officers or boards of health administer permits where their authority includes individual sewage-disposal permits.⁵ Local boards of health can adopt stricter sanitary regulations after the required public-hearing process.⁵ MassDEP provides statewide guidance on installing, using and maintaining septic systems under Title 5.¹⁷

Start with the city or town board of health: ask who approves the proposed system, which site evaluations are needed, and where to obtain the current septic application and fees. We could not confirm a statewide septic fee or a complete statewide installation-permit procedure; ask the board of health and MassDEP Title 5 program.¹⁷ For land abutting a public way where the town has provided both a drain and a sewer, the cited law requires sewage connections as directed by the responsible sewer authority.¹⁸

Can you live in an RV or tiny home on your Massachusetts land?

Massachusetts has 0 counties with a confirmed county-level answer on private-land RV occupancy and 0 with a confirmed county-level tiny-home occupancy answer.⁶¹⁹ We could not confirm statewide permission or prohibition for living in an RV on a private lot; ask the municipal zoning office and board of health about the intended duration and sewage arrangement.

In designated Massachusetts seasonal communities, tiny houses must be detached dwellings of 400 square feet or less, excluding lofts, and the community must adopt provisions permitting their construction as year-round housing meeting state and local building codes.⁷ That provision is conditional on seasonal-community designation and municipal adoption.⁷ A separate Massachusetts rule permits an owner-occupier to use a manufactured home at the site of a residence destroyed by fire or another natural holocaust for up to 12 months during rebuilding, subject to the sanitary code.²⁰ That narrow rebuilding provision does not establish general RV occupancy permission.²⁰

Where are the best Massachusetts counties for a bolthole?

Franklin County leads the Massachusetts Bolthole Index at 67, followed by Berkshire County at 63, Dukes County and Hampshire County at 60, Nantucket County at 57, Barnstable County at 56, Worcester County at 50 and Plymouth County at 46.²¹ All of those counties are listed with residential building-permit requirements and zoning.²¹ For septic approvals, start with the local board of health under the state environmental-code framework rather than treating an Index score as development approval.⁵

The median county farmland value is $14,912 per acre; Berkshire County is $8,606 and Franklin County is $8,637 per acre.²² These are farmland-value comparisons, not quotes for a specific building lot.²² The median county effective property-tax rate is 1.1%, and the median county property-tax bill is $4,946 annually.²³ Ask the municipal assessor for the parcel assessment before budgeting.

What water and private-well rules apply in Massachusetts?

Massachusetts uses a regulated-riparian water framework: registration or permitting applies above 100,000 gallons per day, while small domestic use is exempt from that withdrawal regime.²⁴ A small domestic withdrawal exemption does not remove a city or town private-well site permit that the municipality requires.²⁴¹²

Massachusetts requires certification for people in the business of digging or drilling wells, and cities or towns may require a private-well site permit with health and safety conditions and a locally determined fee.¹² A well completion report must reach the Department within 30 days after completion.¹² Before buying land, ask the municipal board of health which well siting and water-quality requirements apply, and ask the driller who will submit the completion report.

Watch-outs

Massachusetts city and town zoning controls the parcel district; the absence of county-wide zoning does not establish an unrestricted lot.⁴
The Massachusetts owner-builder registration exemption does not waive building permits or inspections.¹¹
Massachusetts agricultural zoning protections do not exempt land or structures from floodplain or wetlands regulations.²⁵
We could not confirm a statewide driveway-access procedure or floodplain-development procedure; ask MassDOT about a state-highway entrance and the municipal floodplain administrator about the parcel, since agricultural zoning protection does not exempt land from floodplain regulations.²⁵

Sources

Written October 10, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Building permits, zoning and rural land rules in Massachusetts