Off-Grid Living in Mount Desert, Maine

Mount Desert, Maine is a place a lot of off-grid dreamers picture because of its proximity to Acadia, but I want to be upfront: this is not unzoned, rural-anything-goes territory. The Town of Mount Desert operates under a comprehensive municipal Land Use Zoning Ordinance (dating back to 1978) with multiple land use districts, and it's actively enforced by a Planning Board, a Code Enforcement Officer, and a Board of Appeals. If you're picturing a cabin tucked away with no oversight, you'll need to adjust that picture.

On zoning, the town regulates use of land and water, density, and the size and placement of structures across roughly a dozen distinct villages and neighborhoods, each of which can carry different standards. That means "Mount Desert rules" isn't really one thing, it's a patchwork depending on which part of town you're in, so I'd confirm district-specific standards with the Code Enforcement Office before assuming anything.

Dwellings and tiny homes are in a bit of flux. As of early 2025 the town's Warrant Committee was reviewing changes, including a possible repeal of the town's old mobile home and trailer park ordinance (originally from 1970), because it no longer lines up with state standards. I could not confirm current tiny-home-on-wheels or RV placement rules from official ordinance text, so this is one to call about directly.

Building permits are required, administered by a Building Inspector appointed by the Town Manager. But here's the wrinkle: the town's building code was last updated years ago and, per the Code Enforcement Officer, no longer meets the state's 2018 statewide building code standards, meaning towns with out-of-date codes had to repeal them. So confirm what's actually in force right now.

Septic and greywater are handled under Maine's statewide Subsurface Wastewater Disposal Rules, administered locally by Mount Desert's Local Plumbing Inspector. Alternative toilets (other than pit privies) are permit-exempt in certain cases under state rules. Wells fall under state well-construction standards, with the local plumbing inspector as your point of contact, and permit applications (HHE-211, sewer, utility location) run through the Code Enforcement/Planning Office.

Rainwater harvesting and full utility disconnection are both genuinely unclear here. I found no town ordinance language addressing either directly. Disconnected living would likely get evaluated case-by-case through building code and certificate-of-occupancy review, so don't assume silence means permission.

Bottom line: Mount Desert is zoned, actively enforced, and mid-update on some of its codes. Call before you build.