Off-Grid Living in Dayton, Maine

Dayton, Maine is a small town that has chosen to zone itself, so if you're picturing truly unregulated off-grid land here, I need to correct that expectation right away. The Town of Dayton adopted a Zoning Ordinance (most recently amended June 11, 2024) that covers the whole town, administered by a Code Enforcement Officer, Planning Board, and Board of Appeals. That ordinance is the first thing to read before you buy or build.

Zoning and land use. Every parcel falls into a zoning district, and the ordinance is explicit that land can't be used "for any purpose or in any manner except as permitted within the District in which such building, structure, land or water area is located." So whether you can even put a dwelling, camper, or off-grid cabin on a given lot depends on its district, and that's a town-level determination, not a state one.

Dwellings. Dayton has fairly detailed rules for accessory dwelling units, including a requirement that any ADU be verified as connected to "adequate water and wastewater services" before it can be certified for occupancy, and ADUs go through the town's Code Enforcement Officer. I did not find anything in the ordinance specifically addressing tiny homes or RVs used as permanent residences, so that's genuinely unclear and worth a direct call to the Code Enforcement Office.

Building permits. Dayton requires its own building permit, separate from anything at the state level. New construction also triggers a plumbing permit and a Certificate of Occupancy, all under Article 8 of the zoning ordinance. For a new home, the town's own guidance says you'll need an HHE-200 form completed by a licensed soil evaluator as part of that process.

Septic and greywater. Maine handles wastewater at the state level through the Subsurface Wastewater Disposal Rules (10-144 CMR Chapter 241), enforced locally by Dayton's Local Plumbing Inspector, a role currently held by the Code Enforcement Officer. No wastewater work, conventional or alternative, can start without a permit from that Local Plumbing Inspector. Composting and alternative toilets are addressed within the state rule's specific sections, and greywater disposal has its own dedicated section in the same state rule. I didn't find any Dayton-specific addition on top of the state greywater rule.

Rainwater and wells. I found nothing in Dayton's ordinance or state law that specifically restricts rainwater harvesting, so treat that as an open question rather than a "yes." Private wells aren't separately regulated by the town beyond the state baseline, except that the ADU provision requires proof of "adequate water" service, which suggests the town will look closely at water supply when an ADU is involved.

Living off-grid generally. There's no single ordinance in Dayton that says "you must connect to utilities," but the combination of a required building permit, plumbing permit, Certificate of Occupancy, and an approved wastewater design effectively means the town expects a functioning water and wastewater system before you occupy a home. That's a meaningful, if indirect, constraint on fully disconnected living.

Bottom line: Dayton is zoned and permit-driven, and while state rules give you a real path to legal septic, greywater, and composting systems, several specifics (tiny homes, RVs, rainwater) aren't spelled out and need a direct conversation with the Code Enforcement Office.