Off-Grid Living in Lewis County, New York

I'll be upfront: Lewis County, New York is one of those places where the answer to "can I do this off-grid?" is almost always "it depends which town you're in." The county itself has no countywide zoning code. Zoning authority sits with individual towns and villages, and several of them (Port Leyden, Diana, Watson, Greig, Croghan) are actively writing or updating zoning laws right now, as of 2024-2026. The Lewis County Planning and Community Development Department helps towns draft these laws but has no regulatory power of its own, and the County Planning Board is advisory only.

So for raw land occupancy, tiny homes, and RVs as dwellings, I can't give you one countywide rule. Where a town hasn't adopted zoning, you generally get more flexibility by default under state baseline rules. Where a town has zoning, you need to check that specific town's law.

Where the county DOES have a firm, unified hand is building and fire code enforcement. The Lewis County Building and Fire Code Department, based at the county courthouse, administers the New York State Uniform Fire Prevention and Building Code on behalf of most towns and villages. If you're putting up any habitable structure, you'll likely go through this office, using their Cloudpermit online system, with an application, plot plan, and building plans. One useful exemption I found in their materials: non-habitable, single-story structures up to a small square footage with proper separation don't require a permit fee, similar to the state's small-structure carve-out.

Septic is governed by New York State Department of Health standards (Appendix 75-A) statewide, and Lewis County's building-permit process references compliance with these and other state/local regulations before a permit issues. I could not confirm a distinct, published county septic-permit application separate from the county's septic replacement grant program, so if you're planning a system, call the Lewis County Public Health Department directly to confirm the process.

Greywater reuse and rainwater harvesting have no confirmed county-specific rules; treat these as governed by state baseline standards only (greywater reuse for things like toilet flushing typically requires disinfection under state guidance).

Private wells are permitted, following NYS DEC and DOH standards. Code enforcement officials review well siting before issuing building permits and certificates of occupancy, and wells must be installed by a DEC-registered contractor per state DOH guidance.

On living fully off-grid without utility hookups: I found no countywide law forcing you to connect to grid power, water, or sewer. But the state Uniform Code's habitability and plumbing requirements functionally require an approved water source and wastewater system, so full disconnection runs into those state-level requirements regardless of what your town's zoning says.

Bottom line: start with your specific town's zoning office (if one exists), then the county Building and Fire Code Department for anything you build.