In unincorporated Sweetwater County, Wyoming, all residential, commercial, industrial and mineral construction needs an approved zoning permit from Sweetwater County Land Use — for most projects, the Construction & Address permit. The county has not adopted and does not enforce the International Residential or Building Code, so it issues no building permit and makes no building inspections; it inspects for the 2021 International Fire Code. The Land Use Office is at 80 W. Flaming Gorge Way, Suite 23, Green River (307-872-3914 or 307-922-5430), Monday to Friday 8:00am to 5:00pm. Inside Rock Springs and Green River, the city building departments issue building permits.
This guide covers the county’s Construction permit and its fees, who handles electrical, fire, septic, access and well approvals, and what an owner must arrange where no county building inspector will visit.
Confirm the authority having jurisdiction before filing. This guide is for projects in unincorporated Sweetwater County. Rock Springs and Green River enforce building codes and issue building permits inside their limits; in Superior, Wamsutter, Granger and Bairoil, contact the town. Outside Rock Springs, electrical permits and inspections and State Fire Marshal plan review come from the state Department of Fire Prevention and Electrical Safety.
Sweetwater County projects often involve the Construction & Address permit, zoning and site-plan rules, oil-and-gas or industrial uses (oil and gas wells also need the Construction permit), a septic permit from county Environmental Health, a county access permit, a well permit from the State Engineer’s Office, state electrical permits and State Fire Marshal review. Read the county’s Red Desert information packet before buying land there.
Wyoming’s state-adopted codes are the 2024 International Fire, Building, Fuel Gas, Mechanical and Existing Building Codes and the 2026 National Electrical Code, applied through the State Fire Marshal’s plan review and electrical program. Cities and counties add their own building, zoning and floodplain rules, so confirm which authority has jurisdiction for Sweetwater County projects. Wyoming’s state codes and review
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Get a free quote →Does unincorporated Sweetwater County require a building permit?
Not a building permit, but every project needs an approved zoning permit before construction or a new use starts. The county has not adopted the IBC or IRC; it is the applicant’s or landowner’s responsibility to make sure construction standards are met and buildings are inspected.
Permits that apply
- A county Construction & Address permit for a new home, accessory structure, addition, or commercial or industrial building, and for oil and gas wells
- Other Land Use approvals where they apply: grading, signs, home occupations, conditional or temporary uses, major site plans, a change of use, subdivisions and a new address without construction
- A state electrical wiring permit (state electrical licensing, 307-777-7288), with inspection by the State Fire Marshal’s office (307-871-0035)
- A septic permit from Sweetwater County Environmental Health for a new system where no sewer district serves the lot
- A county access permit from Public Works for a new access onto a county road or work in the county road right-of-way, and a county licence for utility lines crossing county roads
- State Fire Marshal plan review for the commercial and public buildings listed in W.S. 35-9-108, and a State Engineer’s Office permit for a new well
No county permit
- Painting, wallpaper, flooring, trim, cabinets, countertops, and similar finish work
- Building permits and building inspections: the county has not adopted the International Residential or Building Code
- Plumbing and mechanical permits: the county’s application list includes none
- Work inside Rock Springs, Green River or a town, which follows that municipality’s rules instead
Not sure which county application your project needs? The Land Use Office answers that question on 307-872-3914.
Get the permit before work begins. Construction started without an application, or before the application is approved, can draw a late application fee of $500 for residential or $1,000 for non-residential work on top of the application fee.
Who handles permitting in Sweetwater County?
Sweetwater County Land Use reviews and approves the zoning permits for all construction and use in unincorporated areas, assigns addresses and administers the zoning resolution, growth management plan and subdivision regulations. It issues no building permit. The county’s Code Enforcement Specialist/Fire Warden inspects for the 2021 International Fire Code. Electrical permits come from the state, with inspection by the State Fire Marshal’s office, which also handles plan review for the buildings listed in W.S. 35-9-108. Septic permits come from county Environmental Health and access permits from county Public Works. Confirm municipal limits before filing.
Not sure this scope needs a permit?
Get a free quote →| Detail | Information |
|---|---|
| Primary authority | Sweetwater County Land Use (zoning Construction & Address permit); no county building permit |
| Office | 80 W. Flaming Gorge Way, Suite 23, Green River, WY 82935 · 307-872-3914 or 307-922-5430 · landuse@sweetwatercountywy.gov · Monday to Friday 8:00am to 5:00pm |
| Apply | Construction permit application with a site plan and floor plan, filed with the Land Use Office; state electrical permits through the state’s online portal |
| State / local code basis | No county building or residential code; the county enforces the 2021 International Fire Code. State-adopted codes apply to work the State Fire Marshal reviews. |
| Common overlays | Zoning resolution and growth management plan, county fire-code inspection (307-872-3923), Environmental Health septic permits (333 Broadway, Suite 010, Rock Springs; 307-872-3930; by appointment), county access permits, State Engineer well permits, State Fire Marshal plan review and state electrical inspection |
| Contractor credentials | Local contractor license or registration where required, Wyoming electrical license where applicable, plumbing/mechanical/fire/specialty credentials, bonds, insurance, and separate trade permits where required |
Apply through the correct path. File the Construction & Address permit with the Land Use Office in Green River or by email, and wait for approval before starting. Apply for the electrical permit through the state, the septic permit with Environmental Health and any access permit with Public Works.
Sweetwater County permit fees
There is no county building permit fee or valuation-based fee. The Construction permit carries a flat application fee set by the type of construction (application form updated July 2024); credit card payments carry a 3.5% convenience fee. State electrical, septic and access fees are separate.
Rather talk it over?
Call 1-855-478-4290 →| Fee component | How it works |
|---|---|
| Residential Construction permit | $50 application fee |
| Non-residential Construction permit | $1,500 for a primary structure; $500 for an accessory structure |
| State / local plan review | No county building plan review; State Fire Marshal plan review fees, set by state rules, apply to the buildings it reviews |
| Trade permits | State electrical wiring permit $50, temporary power $40 |
| Zoning / access / utilities | Septic, access and other Land Use applications are charged separately |
| Late application | $500 residential or $1,000 non-residential, in addition to the application fee, for work begun before approval |
Need a precise number for a specific Sweetwater County project? Send us the scope, address, and valuation and we can help estimate the filing path, likely reviews, and permit fee categories.
Sweetwater County trade permits
With no county building permit, the trade approvals in unincorporated Sweetwater County are the state electrical permit and the county septic permit. Electrical work needs a state-licensed electrician unless an owner exemption applies.
Electrical permits
The county directs electrical permitting to State of Wyoming electrical licensing (307-777-7288) and inspection to the State Fire Marshal’s office (307-871-0035). State wiring permits are issued through the state’s online portal for work where the utility must connect or disconnect power.
Plumbing & gas permits
The county issues no plumbing or gas permits. A new septic system needs a permit from Sweetwater County Environmental Health (by appointment); sewer and water connections go through the local water or sewer district; a new well needs a State Engineer’s Office permit (307-777-6163).
Mechanical / HVAC permits
The county issues no mechanical permits. Type I commercial kitchen hoods, fuel tanks and dispensing, and spray finishing need State Fire Marshal plan review.
Rather not deal with the Sweetwater County building department?
Get a free quote →Fire, occupancy, and specialty permits
Commercial and public buildings listed in W.S. 35-9-108, and all fire alarm, sprinkler and suppression work, need State Fire Marshal plan review. Non-residential site plans must show parking, signs, outdoor storage and lighting, and the floor plan must show exits, emergency lighting and fire extinguishers; the county inspects for the 2021 International Fire Code (307-872-3923).
Wyoming has no state general-contractor licence, so contractor licensing is local. Electricians and electrical contractors are licensed by the state, and electrical work is permitted and inspected by the state unless the city or county has taken on electrical enforcement itself. Plumbing, mechanical and specialty credentials depend on the local jurisdiction. Contractor and electrical licensing in Wyoming
How to get a building permit in Sweetwater County
Confirm jurisdiction & zoning
Check whether the parcel is inside Rock Springs, Green River or a town, its zoning district and growth-management area, sewer and water availability, and whether State Fire Marshal review applies.
Prepare your application package
Complete the Construction permit application with a scaled site plan (setbacks, driveway and culvert, drainage, septic and well, fuel tanks, utilities) and a floor plan showing rooms, egress windows and doors, smoke and CO detectors, and hallway and stair widths.
Submit application & plans
Submit to the Land Use Office in Green River or by email to landuse@sweetwatercountywy.gov. Inside a city or town, file with that municipality instead.
Plan review & corrections
Land Use staff review the application against the zoning resolution’s lot and development standards and approve it, approve it with conditions or deny it, and assign the address.
Pay fees & receive permit
Pay the Construction permit application fee and any septic, access and state electrical fees.
Schedule inspections
Book the county fire-code inspection (307-872-3923), the state electrical inspection and the septic inspection. There is no county footing, framing or final building inspection.
Want this handled start to finish?
Get a free quote →Inspections in Sweetwater County
The county makes no building inspections in unincorporated Sweetwater County: it inspects for the 2021 International Fire Code, electrical work is inspected by the State Fire Marshal’s office, and septic systems by Environmental Health. Under the county’s application, the applicant or landowner is responsible for meeting construction standards and having buildings and structures inspected.
Do not cover electrical or septic work before it is inspected. Keep the approved Construction permit, its conditions, the electrical and septic permits and any State Fire Marshal approval on site.
Official Sweetwater County permitting resources
- 🏢 Sweetwater County Land Use
- 🏢 Sweetwater County application forms
- 🏢 Sweetwater County Planning & Zoning Commission
- 🏢 Sweetwater County official website
- 📄 Wyoming State Fire Marshal - plan review
- 📄 Wyoming State Fire Marshal - adopted codes and rules
- 📄 Wyoming electrical safety permits and licensing
- 📄 Wyoming electrical licensing
- 📄 Wyoming wiring permits
- 📄 Wyoming State Fire Marshal Office
Inspections are where schedules slip.
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Alliance Permitting is a permit documentation and submission company: we prepare your paperwork, file it correctly, and coordinate with the county Land Use Office and state reviewers through issuance. We are not a contractor and do not perform licensed plan review or inspections; that work stays with your licensed team and the jurisdiction.
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More Wyoming permitting guides
This guide is provided by Alliance Permitting for general informational purposes and reflects publicly available information believed accurate as of June 2026. Permit requirements, fees, codes, portals, contractor licensing, and review timelines change; always confirm current details with the local permit authority before filing. This is not legal advice.