Off-Grid Living in Mexico, Maine

I've been digging into what off-grid living actually looks like in Mexico, Maine, a small organized town in Oxford County, and here's my honest read after going through the town's ordinance list and state records.

First, the big picture: Mexico is a zoned, organized town, which puts it in a very different category from Maine's unorganized townships. That means you can't just buy raw land and do whatever you want. According to the town's ordinance archive (hosted via UMaine's DigitalCommons), Mexico has adopted its own Land Management, Shoreland Zoning, Site Plan Review, Subdivision, and Wellhead Protection ordinances, plus a Building Code, all enforced locally by the town's Code Enforcement Officer rather than the state's Land Use Planning Commission. So the town, not the state, is your first stop for land use questions.

On dwellings, I couldn't confirm any specific Mexico rule on tiny homes or RVs as permanent residences. The town does list Mobile Home Park and Rental Housing ordinances, which might be relevant but aren't the same thing as a tiny-house rule. I'd call this one genuinely unclear and worth a direct call to the Code Enforcement Officer before you commit to a structure type.

Building permits are definitely required. Mexico's town website confirms an adopted Building Code Ordinance and points residents to the Code Enforcement Officer, Mathew Theriault, for permits and forms.

Septic and greywater systems follow the state baseline: Maine's Subsurface Wastewater Disposal Rules (administered by the Maine CDC) require a Local Plumbing Inspector, appointed by the town, to issue permits for septic systems, composting/alternative toilets, and greywater disposal areas. I didn't find anything suggesting Mexico deviates from this, so plan on going through the town's LPI.

Rainwater harvesting: no state or local rule turned up in my research. That doesn't mean it's illegal, just that nobody's written a specific rule I could find, so I'd flag it as an open question.

Private wells look permitted with minimal state involvement, though Mexico's Wellhead Protection ordinance could add siting requirements near municipal water sources. I haven't reviewed that ordinance's actual text, so I can't tell you exactly what it requires, just that it exists.

Living fully disconnected from utilities doesn't appear to be directly banned or required by name, but in practice it gets shaped indirectly by the building code, septic, and well rules the town already enforces.

Bottom line: Mexico is a real, functioning municipality with real ordinances, so "off-grid" here means "off-grid within town rules," not "off the radar." Call the Code Enforcement Officer before buying land or building anything.