Off-Grid Living in Merrimac, Massachusetts

I've been digging into what off-grid living would actually look like in Merrimac, Massachusetts, and the short version is: this is a zoned town with fairly conventional New England rules, not a place where you can just buy raw land and disappear off into self-sufficiency without paperwork.

Zoning. Merrimac has a formal zoning bylaw, administered by the town, laying out seven districts plus overlays for floodplains and water supply protection areas. The bylaw's own language requires that "no building, structure or lot may be used" except in conformity with district regulations. Interestingly, the town's Master Plan admits the bylaw dates back to 1960s-era thinking and doesn't flex well for lower-density or alternative living arrangements. That's a candid signal from the town itself that off-grid-style land use isn't really built into the code, so you'd be working against the grain, not with a supportive framework.

Dwellings and tiny homes. I couldn't find Merrimac-specific language on tiny house minimum sizes or RV living in the bylaw excerpts I reviewed. Manufactured and modular buildings are addressed, but they fall under the statewide 780 CMR code, and importantly, only a Licensed Construction Supervisor, not the homeowner, can pull the building permit for a manufactured home. Confirm current tiny-home and RV-as-dwelling policy directly with the Building Commissioner's office.

Building permits. Merrimac's Inspectional Services Department enforces the Massachusetts State Building Code and Board of Fire Prevention Regulations locally. This is state-level code with local enforcement, not a town carve-out.

Septic and greywater. Massachusetts' Title 5 (310 CMR 15.00), a state DEP regulation, governs septic and effectively greywater disposal too. Merrimac's Board of Health enforces it locally and can have supplemental rules, though I found no evidence of a Merrimac-specific septic bylaw beyond Title 5. Composting toilets and greywater reuse are not clearly spelled out locally, so I'd call this restricted-by-default to the state baseline until confirmed otherwise.

Rainwater harvesting. No town ordinance on this turned up in my research. Treat it as falling under the state baseline with no explicit local rule either way.

Wells. Wells appear permitted and are overseen by the Board of Health, but I found no Merrimac-specific siting bylaw, just the state framework.

Utilities. No bylaw explicitly allows or forbids full off-grid electrical disconnection, but solar and electrical work still need standard permits through Inspectional Services under 780 CMR.

Bottom line: nothing here is a hard "no," but nothing is a friendly "yes" either. Everything routes back through the state code (780 CMR, Title 5) with Merrimac's own offices doing the enforcing, and several specifics just weren't confirmed in what I could find.