Off-Grid Living in Henniker, New Hampshire

Henniker, New Hampshire is a zoned town, and that surprises some people who think of rural New Hampshire as a free-for-all. It isn't. The Town of Henniker maintains its own Zoning Ordinance (Chapter 133), Subdivision Regulations (Chapter 202), and Site Plan Regulations (Chapter 203), all administered locally but layered on top of New Hampshire state law (RSAs). If you're picturing raw land where you can just park a camper and live quietly, Henniker's framework doesn't really allow that without going through the town's process.

Zoning and building permits. The Town's Zoning Administrator reviews a zoning permit application for building projects, checking which zoning district and overlay district your parcel sits in and confirming setbacks. Separately, since July 1, 2021, Henniker requires permits for building, electrical, plumbing, mechanical, driveway, and demolition work, enforced by the Building Inspector under the State Building Code plus local ordinances. A building permit is valid for two years. This is all confirmed on the town's own building/planning pages.

Tiny homes and RVs. I could not find a Henniker-specific ordinance addressing tiny houses or living in an RV. My assumption, based on how New Hampshire towns generally treat this, is that RVs and wheeled tiny homes get treated as recreational vehicles rather than dwellings unless the town says otherwise, but Henniker's specific stance isn't confirmed. Call the Zoning Administrator before you commit to this plan.

Septic. This is a genuinely dual-authority area. The state, through NH DES's Subsurface Systems Bureau, must approve any septic system before it's installed, replaced, or expanded, and towns can locally regulate septic construction under RSA 485-A. Henniker's own zoning permit form asks about "on Town Sewer" status, showing the town coordinates with the state approval. No town-specific composting toilet rule turned up in my research, so check with the Building Inspector before assuming one is fine as your sole system.

Greywater, rainwater, wells, utilities. None of these have a Henniker-specific ordinance that I could locate. Greywater reuse and rainwater harvesting fall into a genuine gray zone, not clearly permitted or restricted at the town level, and I'd lean on the state building code as adopted locally. Private wells are licensed through the state Water Well Board (RSA 482-B); Henniker doesn't appear to add its own layer beyond normal site-plan setback review during a building permit. As for disconnecting from utilities entirely, I found no explicit hookup mandate, but a habitable structure will typically need to show an approved septic or sewer connection and, where used, a permitted well, through the same building-permit process.

Bottom line: Henniker is not hostile to off-grid living, but it is a regulated town, and the path runs through the Zoning Administrator and Building Inspector for almost everything. Confirm specifics before you build.