Off-Grid Living in Sandwich, Massachusetts

I'll be upfront: Sandwich, Massachusetts is not a place where you can just buy a wooded lot and quietly go off-grid. It's a fully zoned town, and both the town and the state layer rules on top of each other, especially around water and septic because of the Cape's sensitive aquifer.

Zoning. The Town of Sandwich Zoning By-Law (administered by the Planning Board and Board of Appeals, with the Board of Appeals acting under state Chapter 40A) divides the town into residential, agricultural, and overlay districts, including a Water Resources overlay protecting Zone II aquifer recharge areas. Where you can put a dwelling, and what kind, depends entirely on which district your parcel sits in, so I'd check with the Planning Board before assuming anything.

Dwellings, tiny homes, RVs. Sandwich's general bylaws bar setting up a tent, sleeping in a vehicle, or sleeping in the open, on private land without the landowner's written permission (or on town land without Selectmen's permission) between 8pm and 8am. That's a town bylaw, not a state rule, and it's clearly aimed at preventing casual camping as housing. The town also separates "Accessory Dwelling Units" (need a special permit, must serve as affordable rental housing) from smaller "Accessory Apartments" (allowed by right but capped in size and can't be rented). Neither is quite the same as living full-time in a tiny house or RV, and the by-law doesn't spell that scenario out, so I'd call the Building Department before trying it.

Building permits. The Building Department enforces the Massachusetts State Building Code (780 CMR), a state code applied locally. The Building Inspector can act against illegal construction or occupancy, so any structure meant as a residence needs a permit.

Septic and composting toilets. The Board of Health, working under state DPH and MassDEP rules (Title 5), issues septic and percolation permits. Sandwich has gone further than the state minimum in some sensitive spots: no new Title 5 septic systems in coastal beach/dune/barrier areas (except repairs to existing homes), and Nitrogen Sensitive Area rules that limit wastewater flow per acre. As of late 2023 the town had also asked MassDEP about temporarily suspending some Title 5 requirements in Natural Resource Areas, worth asking the Health Department about directly.

Greywater. No town-specific greywater rule turned up in my research; it appears to fall under the same Title 5/Board of Health wastewater framework as septic.

Rainwater harvesting. I found no Sandwich bylaw addressing this either way. That likely means the state baseline applies, but I'd confirm with the Building or Health Department since silence isn't the same as permission.

Wells. The Health Department issues well installation, repair, and removal permits, and Title 5 setback rules (distance from septic systems, etc.) apply locally.

Utilities. No Sandwich bylaw specifically bars going off-grid electrically. The Building Department's authority under the state building code would still govern any electrical or solar work you do.

Bottom line: nothing here says "off-grid impossible," but Sandwich is a regulated, zoned town where septic and water rules are notably strict because of the aquifer, so plan on real permitting conversations rather than quietly disappearing into the woods.