Off-Grid Living in Dartmouth, Massachusetts

I've been digging into what it actually takes to live off-grid in Dartmouth, Massachusetts, and the short version is: it's a fully zoned town, so "off-grid" here means navigating permits rather than avoiding them entirely.

Zoning. Dartmouth is not unzoned land. The town has 14 zoning districts under Chapter 375 of the Town Code, administered locally under the authority the state gives towns via M.G.L. Chapter 40A. Whatever you want to do with a parcel, whether that's a small cabin, a homestead, or bare land, has to conform to the rules for that district. There is some allowance for older "grandfathered" vacant lots with different frontage and setback standards, but that depends on when the lot was created and who owns it, so I'd confirm that with the Town Clerk or Building Department before assuming anything.

Dwellings, tiny homes, RVs. The Building Commissioner also acts as Zoning Enforcement Officer, and dwelling structures are governed by district rules within the zoning bylaw. I did not find a Dartmouth-specific tiny-home minimum size rule or an RV-as-permanent-dwelling provision in the official sources I checked, so I'm treating that as unconfirmed. Assume the state's baseline building code (which now includes an Appendix Q tiny house option) applies unless the Building Department tells you otherwise.

Building permits. All construction needs permits and has to meet the Massachusetts building code, enforced locally by the Building Commissioner's office. Call the Building Department at (508) 910-1820 before you build anything.

Septic. Massachusetts' Title 5 (310 CMR 15.000) is the state baseline for septic and wastewater, but Dartmouth's Board of Health has adopted its own supplemental regulations on top of it. The town has also been pushing back against a proposed state nitrogen-control watershed permitting rule (314 CMR 21) that could someday affect septic requirements in parts of town near sensitive watersheds. Check with the Board of Health, (508) 910-1804, since local supplements really do change what's required beyond the state minimum.

Greywater and rainwater. I found nothing in Dartmouth's bylaws that departs from the state Title 5 treatment of greywater as wastewater, and nothing locally addressing rainwater harvesting either way. Treat both as governed by the state baseline until the Board of Health or Building Department says otherwise.

Wells. This is a big one locally: Dartmouth's Board of Health has its own well permit regulations, layered on the state authority given to local boards of health under M.G.L. Chapter 111 §122. The Board recently adopted revised "Private Water Supply Well Regulations" covering siting, construction, testing, setbacks, abandonment, and enforcement. Get the current version from the Board of Health office (400 Slocum Road) rather than relying on any summary, including this one.

Utilities. There's no bylaw against disconnecting from the grid that I found, but solar and electrical installations still need permits and licensed-electrician sign-off under the state code, and your septic/well obligations don't go away just because you're off-grid.

Bottom line: off-grid living is workable in Dartmouth, but it runs through the Building Department, Board of Health, and zoning bylaw every step of the way, not around them.