Off-Grid Living in Seabrook, New Hampshire

I've been digging into what off-grid living actually looks like in Seabrook, New Hampshire, and the short version is: this is a fully zoned coastal town, not a rural free-for-all, so anyone hoping to go off-grid here needs to work within the Town's Planning Board and Zoning Board of Adjustment rules, not around them.

Zoning. Seabrook is carved into multiple numbered zones (like 2R, 6R, and 6-M North Village), each with its own dimensional and use standards set by the Planning Board. There's also a separate Beach Village District with its own zoning ordinance, subdivision rules, and site plan regulations, so if your land is near Seabrook Beach, different rules apply than in the rest of town. Notably, a second dwelling unit on a residential lot is only allowed if the lot is 45,000 square feet or larger, capped at two units total. Raw land use is shaped by these zone rules plus subdivision regulations, so I'd treat any land purchase as zone-specific homework, not a blanket assumption.

Tiny homes, RVs, alternative dwellings. I couldn't confirm how Seabrook's ordinance treats tiny homes on wheels or long-term RV living as a dwelling. This isn't addressed clearly in what I found, so it needs a direct read of the Zoning Ordinance's use tables or a call to the Building Department / Code Enforcement office.

Building permits. Local permits and inspections are required, administered by the Building Department under state-adopted building codes plus town enforcement. This isn't optional for any structure meant as a residence.

Septic and composting toilets. Septic work needs written approval from NH DES's Subsurface Systems Bureau (a state-level requirement under RSA 485-A), and the Town can also weigh in on local septic construction or expansion, meaning you may need both a state permit and local coordination. I found no Seabrook-specific rule on composting toilets.

Greywater and rainwater. Neither has a confirmed Seabrook-specific ordinance. Rainwater harvesting would likely fall under whatever state plumbing/residential code the Building Department applies, but I'd confirm directly.

Wells. Seabrook runs its own municipal water and wastewater systems, but private wells on unconnected lots remain under the state's Water Well Board rules. No town-specific well ordinance turned up.

Full utility disconnection. I found nothing explicitly banning or requiring utility hookups in Seabrook. This would need direct confirmation from the Health or Building Departments before you'd bet a whole off-grid plan on it.

Bottom line: Seabrook is workable for off-grid elements like private wells and septic, but its active zoning and building enforcement mean you're operating inside a real regulatory structure, not off in the woods unnoticed.