Building permits, zoning and land rules in Sheridan County, Wyoming

Yes, in unincorporated Sheridan County, Wyoming. A zoning and/or building permit must be obtained before construction, reconstruction, alteration or a change in the use of a structure or lot¹. Some structures or uses are exempt from the zoning permit, and the county directs applicants to Public Works to learn whether an exemption applies and to get the proper application¹.

Do not start first and sort out the paperwork later: Sheridan County assesses an additional inspection fee when construction begins without a permit¹. Inside incorporated cities and towns, the municipality may administer its own building permit requirements, so land inside a city or town needs a municipal answer rather than an assumption based on county rules¹. Septic permits are different: the county's Public Works office handles them countywide (see the septic section below)³. County Public Works also provides letters of occupancy, although a letter is not shown to be required for every project⁵.

Sheridan County Public Works is the office that issues county building permits, and it also handles zoning applications, septic permits and floodplain permits^1,5. Public Works can be reached at 307-675-2420 or publicworks@sheridancountywy.gov¹. Its published forms include building and zoning, floodplain, septic and driveway applications¹.

Floodplain questions and floodplain permits for property in the unincorporated area also go through the same department⁵. Before filing, give Public Works the parcel location, present use, proposed use and a basic project description so staff can tell you which jurisdiction applies and which forms you need¹. That jurisdiction check matters because the county's building permit rule recognizes both zoning permit exemptions and separate municipal administration¹.

Yes. Sheridan County's zoning resolution regulates the location and use of buildings, structures and land in the unincorporated area of the county, and incorporated municipalities administer their own zoning². Wyoming law lets county commissioners zone unincorporated land but bars county zoning from overriding an incorporated city or town's zoning authority⁶. County Planning administers the Zoning and Division of Land Rules and Regulations and answers zoning district and land use questions⁷.

The current minimum dwelling size, minimum lot size, setbacks, lot coverage and building-height limits could not be confirmed, so ask Public Works for the parcel's zoning district and the standards that apply to it¹. Some structures or uses may be exempt from the zoning permit, but only Public Works can say whether a given structure qualifies¹. A land division can also trigger subdivision review before sale, plat recording or subdivision construction⁸.

Septic permits for every address in Sheridan County come from Sheridan County Public Works, not from a city office and not from Wyoming DEQ^3,9. A septic permit is required for any change to a system, including adding or removing components, but replacing pumps or solid piping without changing the layout does not need one³.

The permit process calls for a soil exploration pit, a percolation test, a completed design guide, proof of ownership and a $250 permit fee³. Construction may begin only after the permit is approved and the Permit to Construct is picked up from Public Works³. Call for an inspection when the system is built but not covered, with at least 24 hours notice; the permit fee covers that inspection³.

Only 16.2% of mapped Sheridan County soils avoid a "very limited" rating for a conventional septic drain field, so acreage alone is not evidence that a standard drain field will work¹⁰. The county's building page also publishes applications for holding tanks, greywater systems and privy-vault non-plumbing sanitation; ask Public Works which one fits the site¹.

We could not confirm a Sheridan County rule on long-term residential occupancy of an RV on private land in unincorporated areas. Ask Public Works about the parcel's zoning district, the length of stay, utility connections and wastewater plan before moving an RV onto the property¹. Temporary camping rules also remain unconfirmed, so do not treat short stays as automatically permitted¹.

A tiny home is not automatically outside county review: a zoning and/or building permit is required before covered construction or a change of use¹. Ask Public Works whether the proposed unit will be treated as a dwelling, manufactured home, recreational vehicle or accessory structure, and which zoning and building approvals follow from that classification¹. Any RV or tiny home that needs wastewater service still needs a septic permit from the same office³.

1. Ask Sheridan County Public Works to confirm whether the parcel is in county jurisdiction, identify its zoning district and name the required zoning and building permit applications¹.
2. Resolve legal access before design; Wyoming law requires qualifying large-parcel dispositions to have binding, recordable ingress, egress and utility easements to a public road⁸. A driveway onto a state highway needs a separate access permit from the Wyoming Department of Transportation¹¹.
3. Secure water authority before drilling; Wyoming requires an approved groundwater permit before well or qualifying spring-development work begins⁴.
4. Apply to Public Works for a septic permit, with the soil pit, percolation test and design guide³.
5. Obtain the zoning and/or building permit before covered construction, reconstruction, alteration or change of use begins¹.
6. Call for the septic inspection before covering the system, then confirm remaining inspections and occupancy documentation with Public Works^3,5.

Start with zoning, buildability, wastewater, water, legal access and flood exposure². Public Works answers floodplain questions for property in unincorporated Sheridan County and issues floodplain permits there⁵. The county's published forms also include a driveway permit packet, but the operative driveway standards were not confirmed, so ask Public Works before relying on an existing approach or cutting a new one, and expect a WYDOT access permit if the road is a state highway^1,11.

Sheridan County receives about 18.4 inches of precipitation annually, and severe drought occurred in 16.9% of measured years, so verify a dependable water source rather than assuming a well will meet the intended use¹⁰. About 16.2% of mapped soils avoid severe limitations for conventional septic drain fields, making an early wastewater feasibility check especially valuable¹⁰. Federal land makes up 27.3% of the county, so confirm recorded access rather than relying on an apparent road across adjoining land¹⁰. The effective property-tax rate is about 0.6%, with a median annual bill of $1,951¹⁰.