Off-Grid Living in Plainfield, New Hampshire

I've been digging into what off-grid living actually looks like in Plainfield, New Hampshire, and the short version is: this is a zoned town with real oversight, not a "wide open" rural spot. Here's what I found.

Zoning. Plainfield adopted zoning back in 1971 and has amended it since, per the Town of Plainfield's own ordinance documents. There are five districts plus a Wetland-Floodplain Overlay. What you can do with raw land depends heavily on which district it's in, ranging from Village Residential (meant for residential use) to the overlay zone, where permanent residences aren't allowed at all. You really need to check your specific parcel with the town's Land Use Office before assuming anything.

Dwellings, tiny homes, RVs. The zoning ordinance allows residential use in most districts, but each has its own density and minimum lot size rules. I found specific language about mobile homes: temporary occupancy trailers face restrictions, and trailers used for permanent occupancy have to meet the same standards as regular residences. I couldn't confirm anything specific to tiny-homes-on-wheels in the current ordinance text, so if that's your plan, call the town directly.

Building permits. The town is clear that it wants builders talking to the Town Office and building inspector at the planning stage. Some small structures are exempt from permits, things like non-residential buildings under 200 square feet, short fences, low retaining walls, small water tanks on grade, and low sidewalks/driveways, though anchoring rules still apply. Anything bigger needs a permit.

Septic. This is state territory. New Hampshire DES requires a septic system (an individual sewage disposal system) for any structure that has a water supply connected and discharges wastewater. Composting and incinerating toilets are recognized alternatives by DES, but holding tanks are tightly restricted, generally allowed only as stopgaps for failed systems, pending sewer connection, or rare low-frequency commercial use.

Greywater. I couldn't find a Plainfield-specific or clear NHDES residential greywater rule in my research. This one is genuinely unclear, so ask NHDES directly before setting up a greywater system.

Rainwater harvesting. I didn't find any town restriction on collecting rainwater, and the state's plumbing code baseline generally permits it. Not a lot of local detail either way.

Wells. State-regulated through NHDES. Since 1967, any lot under 5 acres needs NHDES subdivision approval to confirm it can support a septic system or sewer connection, and since 1971 new structures statewide need an approved individual sewage disposal system. Municipal approval sometimes plays into that process too.

Utilities. No blanket town rule requiring hookups that I found, but the state's septic rule creates a practical limit: if you connect running water to a structure, you must also have an approved wastewater disposal system. That effectively narrows how "disconnected" you can be if you want plumbing.

Bottom line: state rules (especially NHDES septic and well requirements) set the floor, and Plainfield's zoning and building rules layer on top. Confirm everything with the town before you buy or build.