Off-Grid Living in Oswego County, New York

Oswego County is one of those places where the "who's in charge here" question really matters if you're planning an off-grid setup. Here's the honest breakdown from what I've dug up.

Zoning is not a county thing here. Oswego County has no countywide zoning ordinance. That authority sits with each of the 17 towns and the two cities (Oswego and Fulton). The county's Department of Community Development, Tourism & Planning does something called "239 Review," which is a state-law-mandated check where towns refer certain zoning actions to the county planning board for comment. But that's advisory review, not a zoning code you can look up once and apply everywhere. If you're eyeing a parcel, you need to call that specific town's zoning or code office, because some towns may have very light zoning or none at all, while others (like the City of Oswego) have detailed chapters.

Dwellings, tiny homes, and RVs run into the same town-by-town reality. I can confirm that in the City of Oswego, you cannot park or occupy a trailer as a residence outside an approved trailer park, with a narrow exception for an unoccupied, unused trailer stored in a garage or yard. I have not confirmed how other towns in the county handle RV or tiny-home living, so that's a call you need to make locally.

Building permits are issued by each town or city's own building department, operating under the New York State Uniform Fire Prevention and Building Code. Permits are generally required for construction, renovation, and septic installation, but exemption thresholds (like whether a small shed needs a permit) are set locally, not by the county.

Septic systems are where the county actually has a strong, uniform hand. The Oswego County Health Department's Environmental Health Division reviews and approves all new and replacement septic (OWTS) designs, which must be prepared by a licensed engineer or architect per New York State Department of Health rules. A local building permit is also required alongside the county's septic approval. Composting toilets aren't specifically addressed in anything I found at the county level, so check directly with the Health Department if that's your plan.

Greywater and rainwater harvesting rules are not confirmed at either the county or town level in my research. Both would fall back to New York State's general framework, which technically allows some of this but isn't always straightforward to permit in practice. Don't assume silence means "anything goes," ask the Health Department directly.

Private wells are permitted, and the county Health Department oversees water supply protection and offers a residential well assistance program. There's a private well water application/notice form available from the county, which suggests some notice step exists beyond just hiring a state-registered driller.

Living fully off-grid (no utility hookups) isn't outright banned by any county law I found, but practically speaking, you'll still need county-approved septic and a local building permit for anything habitable, which limits how "disconnected" you can legally go.