Off-Grid Living in Sunapee, New Hampshire

Sunapee, New Hampshire, is one of those towns where I have to be extra careful with the word "off-grid," because the zoning here is written in what's called a "permissive" style. That's set by the Town of Sunapee's own Zoning Ordinance, and it means the opposite of what many rural towns assume: if a use isn't specifically listed as permitted, accessory, or allowed by special exception, it's treated as prohibited. That single fact shapes almost every answer below.

Zoning. Sunapee is fully zoned, with districts including Village-Commercial areas modeled on New England town centers. Uses need to fit an allowed category or go through Site Plan Review or a special exception with the Planning Board / Zoning Board of Adjustment. Occupying raw land without an approved dwelling use isn't confirmed as something the town allows, given the permissive framework.

Dwellings, tiny homes, RVs. This is a real sticking point. A 2024 New Hampshire Supreme Court case actually arose from a Sunapee zoning decision, where a travel trailer on a residential lot was ruled not a permitted use for short-term rental purposes. That case confirms the town's practice: RVs and travel trailers as standalone or supplemental dwellings need specific zoning approval, not just a building permit.

Building permits. The town's Land Use Office issues a Building Package covering the Certificate of Zoning Compliance and construction approvals. For questions about which statewide building code Sunapee has adopted, the New Hampshire Department of Safety, Bureau of Building Safety & Construction is the authority to ask.

Septic and composting toilets. Septic design, installation, and expansion approvals run through the NH Department of Environmental Services, Subsurface Systems Bureau, a state-level requirement. Sunapee's own permit forms ask about sewage disposal adequacy for special-exception uses, so the town does check on this, but composting toilets specifically aren't addressed in any town document I could find. Confirm with DES and the Land Use Office directly.

Greywater and rainwater. I found no Sunapee-specific rule on either, and no state DES rule addressing residential greywater reuse in my research. Rainwater harvesting appears to fall back on whatever the state's adopted plumbing/residential code says generally, not a town-specific ordinance.

Wells. Private wells fall under the state Water Well Board as a baseline. Sunapee's building permit application asks whether a project connects to town water or sewer, which implies wells are common outside service areas, but I found no town-specific well ordinance.

Utility disconnection. Given the permissive zoning stance, living with no water, sewer, or electric hookup isn't confirmed as freely allowed. It would likely need to fit a permitted use category or go through a variance or special exception. I'd call this one genuinely unclear until confirmed with the Land Use Office.

Bottom line: Sunapee's zoning puts the burden of proof on the property owner. Before buying land here with off-grid plans, talk to the Land Use Office early.