Off-Grid Living in Sullivan, Maine

I've been digging into Sullivan, Maine for folks thinking about off-grid life on the Down East coast, and the short version is: this is one of the looser towns I've researched, but "loose" doesn't mean "no rules."

Zoning. Sullivan does not have a townwide, district-based zoning ordinance. Its own ordinance list shows a Building Code Ordinance, a Subdivision Ordinance, and a Shoreland Zoning Ordinance, and nothing else. That means outside the state-mandated shoreland zone (required of every Maine town under the Mandatory Shoreland Zoning Act), there's no general zoning code dictating what you can do with raw land. If you're near a water body, though, shoreland zoning absolutely applies and is enforced locally.

Dwellings, tiny homes, RVs. The town's Building Ordinance (2025) actually names "Tiny Home Parks" as a defined use, so tiny homes aren't ignored, they're regulated. Living temporarily in an RV or camper requires a Building Permit from the town, must follow state subsurface wastewater rules, and is capped at one year of temporary occupancy. Structures under 100 square feet skip the permit but still must meet setbacks.

Building permits. Sullivan runs its own Building Permit process through the Code Enforcement Officer, who administers the ordinance under state authority. Maine's statewide building and energy code (MUBEC) technically applies, but the town told me straight out it doesn't inspect for MUBEC compliance itself, so that responsibility falls on you and your builder.

Septic and composting toilets. Sullivan doesn't run its own septic permitting; it points residents to the state's Maine Septic System Search tool, and actual rules come from Maine's Subsurface Wastewater Disposal Rules (state DHHS/CDC), which do allow composting and alternative systems.

Greywater and rainwater. I found no Sullivan-specific language on either. These fall back to state rules by default, and I'd call the town to confirm before you build a greywater or catchment system, since local silence isn't the same as local permission.

Wells. No dedicated town well ordinance turned up. Well siting interacts with septic setback rules enforced by the same Code Enforcement/Plumbing Inspector office, but there's no standalone Sullivan well code I could confirm.

Utilities. There's no outright ban on living off-grid or disconnected from utilities. The catch is that occupancy itself, especially in temporary or RV-type structures, still needs a permit and wastewater compliance, with that one-year occupancy limit for temporary structures being the real pressure point for someone trying to live off-grid full time in something like an RV.

Bottom line: Sullivan gives you more room than most towns because of the missing general zoning ordinance, but the building permit process, shoreland rules, and state wastewater code are all real and enforced. Call the Code Enforcement Officer before you commit to a plan.