Off-Grid Living in Sheridan County, Wyoming

Sheridan County, Wyoming is a bit of an outlier for the state. A lot of Wyoming counties skip zoning entirely and let you do almost anything on raw land. Sheridan County didn't take that path. It has adopted its own zoning ordinance ("Rules & Regulations Governing Zoning in Sheridan County") that splits the unincorporated county into districts like Urban Residential, Rural Residential, Agricultural, Commercial, Industrial, and Airport, plus special districts. The county Planning Department administers this, so before you buy land or plan an off-grid setup here, I'd call them and find out what district your parcel sits in and what it prohibits.

The county has also adopted the International Building Codes, and Public Works requires a building permit for new construction, additions, or a change of use. I couldn't confirm exact fees or a hard timeline in official sources beyond a general processing target Public Works has mentioned, so treat any number you hear secondhand as unconfirmed and get it straight from them. If you're inside the City of Sheridan, Ranchester, Dayton, or Clearmont, note that those towns run their own separate zoning and building departments with their own rules, the City of Sheridan for instance has its own permit threshold tied to project cost and size.

On tiny homes and RVs as full-time dwellings, I couldn't pin down countywide standards in what's publicly posted. The zoning rules do call out manufactured/mobile home sales and storage as prohibited in at least one special district (Acme), which tells me the county does distinguish between housing types in places, but I'd confirm your specific situation with Planning rather than assume.

Septic is state-regulated by DEQ's Water Quality Division, but Sheridan County is one of the counties where the county, not DEQ directly, is the delegated local permitting authority, so all septic permits run through the county Public Works office. Any change to a septic system needs a permit, though simple pump or pipe replacement without changing the layout apparently doesn't. The Sheridan County Conservation District also offers cost-share help for septic replacements that risk water quality, worth asking about if you're upgrading an old system. Composting toilets specifically aren't addressed anywhere I found at the county level.

Greywater and rainwater harvesting have no county-specific ordinances that I could locate, so both fall back on the state baseline, nothing in Wyoming law blocks either outright. Wells are handled entirely by the Wyoming State Engineer's Office, not the county, you need a permit before drilling and licensed contractors for both drilling and pump installation. Living off-grid without utility hookups doesn't appear to be barred by any county ordinance either, though your building permit and any occupancy sign-off could touch on it indirectly, so it's worth asking Public Works directly.

Bottom line: Sheridan County is more hands-on than most of rural Wyoming. Start with Planning and Public Works before you commit to a plan.