Off-Grid Living in Plympton, Massachusetts

Plympton is a small town in Plymouth County, Massachusetts, and I want to be upfront: it's fully zoned, not one of those rare unzoned New England towns some off-grid seekers hope for. The Town adopted its Zoning Bylaw (Chapter 300) under Massachusetts General Laws Chapter 40A, most recently amended by Town Meeting vote in 2020. That means raw land here isn't a blank slate; it falls into use districts (residential, industrial, floodplain/watershed protection, historic district, etc.), each with its own dimensional and use rules. If you're eyeing a specific parcel, the Planning Board or Building Inspector can tell you which district it sits in and what that means for you.

On dwellings: the bylaw is explicit that no more than one dwelling may be built on a lot, and you'll need building and occupancy permits from the Building Inspector, who enforces the Massachusetts State Building Code (780 CMR) locally. I did not find any Plympton-specific allowance for tiny houses or RVs as permanent residences, so treat that as unresolved and ask the Building Inspector directly before you buy or build.

Septic is where Plympton gets notably stricter than the state. Massachusetts sets the baseline through Title 5 (310 CMR 15.000, under M.G.L. c. 111 §127A), enforced statewide by MassDEP. But Plympton's Board of Health has adopted its own supplemental regulations on top of Title 5 (authorized under M.G.L. c. 111 §31). Most strikingly, new construction using a mounded septic system must sit on a lot of at least five contiguous acres, well beyond what the state alone requires. If you're on a smaller lot, this could shape your whole site plan.

Greywater and rainwater harvesting don't have town-specific rules that I could confirm. Greywater appears to still fall under the state's wastewater framework by default, and I found no Plympton bylaw addressing rainwater catchment one way or the other, so treat both as unclear and worth a direct call to the Board of Health.

Wells are more straightforward: the Board of Health issues yearly permits for well installation, alongside septic work and hauler/installer licensing, and a Health Agent inspects and signs off on installations. That's a normal, permitted path, just one that runs through local health permitting rather than being unregulated.

For grid disconnection, I found no bylaw explicitly banning or blessing living off the electrical grid. Solar is addressed separately in zoning, floating solar is banned townwide, and certain as-of-right solar installations can proceed with compliance and possible site plan review. Nothing here forbids off-grid power generation, but nothing spells out a clear right to disconnect either, so this remains a state-baseline, ask-first situation.