Off-Grid Living in Westport, Massachusetts

Westport, Massachusetts is fully zoned, so anyone thinking of going off-grid here needs to work within the Zoning By-Law rather than assume "no rules apply." I've dug through the town's official documents and here's where things stand.

Zoning. Westport's Zoning By-Law (most recently amended May 6, 2025) governs the use, construction, and occupancy of every parcel in town. The Board of Appeals acts as the Permit Granting Authority under state law (M.G.L. Chapter 40A), and the Planning Board handles special permits and site plan review in certain districts. What you can do with raw land, minimum lot size, frontage, whether it's zoned agricultural or residential, depends entirely on the district your parcel sits in. Confirm with the Planning Board or Board of Appeals before assuming anything.

Dwellings, tiny homes, RVs. The by-law sets general building and dwelling standards, but I did not find a specific Westport provision addressing tiny homes (like an Appendix Q adoption) or living in an RV as a permanent residence. Treat this as unresolved and call the Building Department directly.

Building permits. The Westport Building Department, run by Building Official Steve Smith out of the Central Fire Station, issues all building, plumbing, gas, and wiring permits, now processed online through Permit Eyes. Any off-grid structure, solar install, or electrical work needs a permit and inspection through this office.

Septic and composting toilets. This is a big one in Westport. The town has its own Local Septic System Regulation (effective October 2023), enforced by the Board of Health on top of the state's Title 5 code. Nearly every property here uses onsite septic since there's no municipal sewer for most of town, and old cesspools are no longer allowed and must be upgraded. Composting toilets are allowed but need Board of Health approval plus a Disposal System Construction Permit, and none of these systems, including composting toilets, can go in coastal, floodway, or flood-plain areas except in limited cases.

Greywater. Even with a composting toilet, greywater from sinks and showers still needs a soil absorption system under state guidance from Mass DEP. I found no Westport bylaw allowing standalone greywater reuse outside that framework.

Rainwater harvesting. I couldn't find any Westport-specific rule on rainwater catchment. State plumbing code would govern any indoor potable use, so ask the Building Department if you're planning something beyond simple outdoor collection.

Wells. Private wells are the norm here, almost everyone in Westport drinks well water, and the Board of Health maintains dedicated well information and regulates them.

Utilities. Nothing in the town's official pages prohibits disconnecting from grid power. Solar and off-grid electrical work still falls under the state electrical code (780 CMR) and needs Building Department permitting and a wiring inspection.

Bottom line: Westport allows off-grid elements (wells, composting toilets, solar) but wraps them all in permitting through the Board of Health and Building Department, layered on top of state Title 5 and building code requirements.