Off-Grid Living in New Durham, New Hampshire

I've been digging through New Durham, New Hampshire's zoning and building rules for anyone thinking about going off-grid here, and the short version is: this is a zoned town, so "raw land freedom" isn't really on the table the way it might be in an unincorporated county out west.

Zoning. The Town of New Durham has a real zoning ordinance, administered by the Planning Board, with two base districts (a Residential/Recreational/Agricultural district and a Town Center Mixed Use district) plus conservation overlay districts. There are lot-size-by-soil-type dimensional tables in the ordinance, meaning what you can build and how much land you need depends on your soil classification, not just acreage. The Planning Board was actively revising parts of the ordinance as of a January 2026 hearing, touching definitions, ADU rules, home occupation, and a proposed short-term rental ordinance, so if you're planning something unconventional, check the current text with the Land Use office rather than trusting an old PDF.

Dwellings, tiny homes, RVs. I couldn't find New Durham-specific language nailing down RV or tiny-home occupancy rules. Given that ADU provisions are actively being rewritten, I'd call this genuinely unsettled right now, confirm directly with the Land Use office before you buy anything or move a structure onto land.

Building permits. New Durham requires building permits through its Building Inspector/Code Enforcement Officer, and applications must comply with the zoning ordinance or a Zoning Board of Appeals/Planning Board decision. Notably, the permit application itself references needing a DES "Approval for Construction" for wastewater systems where applicable, so septic and building permitting are linked here.

Septic. This is a two-layer system. New Hampshire's Department of Environmental Services (DES), through its Subsurface Systems Bureau, requires septic system plans from a state-permitted designer, then issues an Approval for Construction and, separately, an Approval for Operation before use. On top of that, New Durham has its own local septic regulations document on file with the town; I wasn't able to fully confirm its contents, so ask the town directly.

Greywater. I found no New Durham-specific greywater ordinance, and state guidance I found addresses municipal wastewater reuse, not household greywater systems. Treat this as unconfirmed and ask Land Use or DES how they'd treat a residential greywater setup.

Rainwater harvesting and wells. I didn't find any New Durham ordinance restricting either. Rainwater collection would fall under the state-adopted building/plumbing code as enforced by the local Building Inspector. Wells go through New Hampshire's Water Well Board licensing process at the state level; just double check whether your specific parcel sits in a wellhead protection overlay.

Off-grid utility disconnection. No explicit town rule bans living without grid hookups, but you're still on the hook for zoning compliance, a building permit, and DES septic approval regardless of whether you're connected to utilities.

Bottom line: New Durham allows off-grid-style living, but through a permitted, inspected process, not by exemption from it.