Off-Grid Living in Greenbush, Maine

I've been digging into what off-grid living actually looks like in Greenbush, a small Penobscot County town in Maine, and here's my honest read after going through the town's own permitting pages and the state rules that back them up.

Greenbush is a zoned town, but not in the comprehensive way a suburb is zoned. What I could confirm is that the Town of Greenbush enforces a Building Ordinance through its Code Enforcement Officer (CEO), and that there are extra layers of permitting specifically in Flood Zones and the Shoreland Zone. Whether there's a broader town-wide zoning map governing use outside those overlay zones isn't something I could pin down from the sources I have, so if you're eyeing a parcel that's not near water or in a flood plain, call the Town Office and ask directly what applies.

On dwellings: the town's process references standard homes and mobile homes (a mobile home placement needs proof of purchase and a Property Tax Release Form before a permit is issued), but I found nothing specific on tiny houses or living in an RV as a permanent dwelling. That's a real gap, and it means you should ask the CEO directly before you commit to either approach.

Building permits are required, administered by the town, with fees scaled to square footage (plus a separate electrical permit fee) and a CEO site visit to check lot lines and setbacks. Septic is handled through Greenbush's Local Plumbing Inspector, likely the CEO wearing a second hat in a town this size, operating under Maine's statewide Subsurface Wastewater Disposal Rules (the state calls this body of rules "Chapter 241"). You'll need a soil evaluation and design submitted before you get a permit, and this applies before any new dwelling is built, whether it's grid-tied or not.

Greywater isn't treated as its own separate category here. Maine's Chapter 241 folds greywater disposal into the general subsurface wastewater rules, so a greywater system still needs the same local/state permitting as a septic system, no shortcut for DIY graywater fields.

Rainwater harvesting and full utility disconnection are both genuinely unclear at the Greenbush level. I found no town ordinance addressing either one directly. My best guess is that any structure still has to satisfy the town's building and plumbing permitting regardless of whether you're grid-connected, but that's an inference, not a confirmed rule, so ask the CEO.

Wells are governed at the state level, and I didn't find a Greenbush-specific well ordinance, so the state baseline is what applies, with the town's CEO as your local point of contact for how a well interacts with plumbing and septic permitting.

Bottom line: start every question with the Greenbush Town Office and CEO, they're the gatekeepers for basically everything here, and lean on Maine's state wastewater program for the technical septic rules.