Off-Grid Living in Erie County, New York

Erie County is a tricky one to research because there's no single rulebook. The county itself, through the Erie County Department of Environment and Planning (DEP), doesn't run a countywide zoning code. Instead, each of the 3 cities, 25 towns, and 15 villages inside them writes and enforces its own zoning and building rules. So the honest answer to "can I put a tiny home on raw land here" is: it depends entirely on which town or city that land sits in. Erie County DEP does get pulled into some projects through New York State General Municipal Law Section 239, which requires municipalities to refer certain land-use actions to the county for review, but that's a coordinating role, not direct permitting.

Building permits work the same way. There's no countywide building department for unincorporated land, because Erie County doesn't really have "unincorporated" territory the way some western states do, everything falls under a town or city, and that town or city hall issues and enforces the building code and investigates violations. If you're eyeing land in Clarence, Hamburg, West Seneca, or anywhere else, your first call is that municipality's building or zoning office, not the county.

Where Erie County genuinely does step in and override the town-by-town pattern is septic and wells. The Erie County Department of Health (ECDOH) administers the Erie County Sanitary Code countywide, and it's stricter than what I've seen in a lot of NY counties. You need a written permit from ECDOH before building a private sewage disposal system, and since 2012 any new home's onsite wastewater system has to be designed by a licensed design professional whose plans go to ECDOH. There's also a Property Transfer Certification requirement, meaning ECDOH has to sign off on the septic and well before title on a property with those systems can transfer. Wells fall under this same county health department review, with sanitary surveys checking casing, cap, and separation distance from the septic system at transfer or new construction, on top of the state-level DEC requirement that wells be installed by a registered water well contractor per NYS DOH Appendix 5-B standards.

For greywater and rainwater harvesting, I couldn't find Erie County-specific guidance in official sources, so I'd treat those as falling back to New York State's general baseline rules until a local page says otherwise. Same with living fully off the utility grid: no countywide mandate forces a water or electric hookup, but note that once public sewer becomes available to a property, several town codes (West Seneca is one documented example) require you to connect and abandon your septic system, so check your specific town's code on this point.

Bottom line: treat Erie County as two layers. Septic, wells, and property transfers are handled uniformly by ECDOH. Everything else, zoning, dwelling type, building permits, utility rules, is a town-by-town patchwork you need to confirm locally before you buy or build.