Unincorporated Sweetwater County building permits

Requirements

• Confirm zoning district and any Growth Management Plan overlay requirements (Rock Springs/Green River growth-area) before applying
• Submit the 'Construction' application form (covers residential and non-residential construction, including oil & gas wells) available from the Land Use Office
• Submit an Address application if establishing a new address is also needed
• Apply BEFORE construction begins — the county assesses a Late Application Fee for construction started without an approved permit application
• Contact the Land Use Office (307-872-3914 or 922-5430) if unsure which application applies to your project

Required documents

• RequiredConstruction & Address Permit ApplicationPrimary zoning/land-use application form for residential, commercial, industrial, and mineral construction (including oil & gas wells) in unincorporated Sweetwater County
• RequiredSite planPer the county's published 'Example - Site Plan Requirements' guidance sheet available from the Land Use Office application forms page

Fee schedule

Requirements

• Obtain and complete the Conventional Septic System Application Package from Environmental Health
• Schedule an appointment — the county approves all septic applications by appointment only
• Larger or non-conventional systems may fall under Wyoming DEQ small-wastewater-system permitting rather than the county's conventional-system program

Required documents

• RequiredConventional Septic System Application PackageCounty Environmental Health's septic application PDF packet

Fee schedule

Requirements

• Submit the County Access/Driveway Permit Application Form for any new road access onto a county road
• Use County License Type A for buried utility lines crossing or paralleling a county road 1,000+ feet
• Use County License Type B for overhead utility crossings or parallel runs under 1,000 feet
• Note: the County Address Permit itself is now issued through the Land Use (Planning & Zoning) application, not through Public Works

Required documents

• RequiredCounty Access/Driveway Permit ApplicationPublic Works Engineering's access-permit application form
• OptionalCounty License Type A or Type B ApplicationRequired only for utility-line road crossings/parallel runs, not for driveway access itself

Fee schedule

Requirements

• Apply through the state's online portal (wyelectrician.imagetrendlicense.com) or the regional inspector office (nearest listed regional offices include Green River)
• Standard wiring permit fee is $50 ($40 for temporary/90-day); the permit fee is waived if you pay for an inspection instead
• Residential inspection fees (include the $50 permit): 100A $70, 125A $82.50, 150A $95, 200A $120, 300A $170, 400A $220

Required documents

Fee schedule

Requirements

• On-site solar energy system defined as: roof-mounted with total nameplate capacity under 5 kW, OR ground-mounted with a footprint under 50% of the primary structure's footprint (2015 Zoning Resolution §4.B.3.g)
• Building- or roof-mounted systems must not exceed the maximum allowed height in the applicable zoning district
• Ground- or pole-mounted systems must not exceed 15 feet in height at maximum tilt, may not extend into the front/side/rear setback at minimum design tilt, and the total ground-mounted array area may not exceed 10% of the lot/parcel area
• Electric solar components must have UL listing and comply with the National Electrical Code
• Panels must be placed so concentrated solar radiation/glare is not directed onto nearby properties or roadways
• Apply through the Land Use Department's 'Construction' zoning-permit application (same application used for general construction) — no separate solar-specific application form was found published
• A Solar Energy Facility (commercial, rated capacity over 0.5 MW) is a fundamentally different, much larger-scale use requiring a Conditional Use Permit, perimeter fencing, 1.25-mile setback from residential properties/zoning, 40-acre minimum lot size, and exclusion from the Growth Management Area and Greater Sage Grouse Core Areas — not applicable to typical residential/rooftop PV

Required documents

• RequiredConstruction & Address Permit Application (Zoning Permit)Same zoning/land-use application form used for general residential and non-residential construction; no dedicated solar-only form is published
• RequiredSite planShowing system location, setbacks, and (for ground-mount) footprint relative to lot area, per the county's Example Site Plan Requirements

Fee schedule

Requirements

• State of Wyoming Electrical Wiring Permit (WSFM) required for EV charger/EVSE circuit installation in unincorporated Sweetwater County — apply through the state's online portal (wyelectrician.imagetrendlicense.com) or a regional inspector office (nearest listed regional offices include Green River)
• Do not contact Sweetwater County Land Use for electrical permits — this is a state program
• Installation must comply with the 2026 NEC as enforced statewide by WSFM effective July 1, 2026
• No distinct EV charger/EVSE fee line, expedited timeline, or SolarAPP+-style instant-permitting platform was found published by WSFM as of this review

Required documents

Fee schedule

Requirements

• A Sign Permit is required for all signs except exempt signs (2015 Zoning Resolution §13.B); application is made on the county's form together with the required fee
• Non-accessory, off-premise, free-standing signs and billboards are prohibited in all districts except in areas specifically defined in the regulations; where allowed, a maximum of one off-premise sign/billboard is permitted per lot or parcel
• Freestanding signs, billboards, and roof signs require certification by a Professional Engineer licensed in the State of Wyoming, certifying compliance with the International Building Code (§13.C.2)
• Sign clearance must be 10 feet above finished grade for the length of the sign; no mounding/filling/berming solely to locate a sign is allowed; freestanding signs may not project beyond the property line or into any right-of-way/easement
• Wall, free-standing, portable, and roof sign type/size/height allowances (e.g., one free-standing sign up to 100 sq ft, scaling with street frontage) apply only within the CRS, B, C, I-1, and I-2 Zoning Districts (§13.F) — signage rights differ by district
• The following do NOT require a Sign Permit: one occupant name/address sign ≤3 sq ft mounted flat against a wall, temporary personal notifications, cornerstones/historical markers, temporary decorations, window displays of actual merchandise, certain menu signs, political/election signs, real estate signs (subject to size/duration limits), and signs for operating oil and gas rigs (§13.E)
• Apply BEFORE erecting the sign — the county assesses a Late Application Fee for work started without an approved permit application (2015 Zoning Resolution §H)

Required documents

• RequiredSigns ApplicationSweetwater County Land Use Department's Sign Permit application form ('2015 - Application - Signs.pdf')
• OptionalProfessional Engineer certificationRequired only for freestanding signs, billboards, and roof signs — WY-licensed PE certification of IBC structural compliance (§13.C.2)

Fee schedule

Requirements

• Plan Review is required for installation, addition, or alteration of any fire protection system (fire alarm, fire sprinkler, fire suppression), regardless of size or valuation, before work begins (WSFM Plan Review program; W.S. 35-9-108(j))
• Submit complete plans and specifications through the Wyoming State Fire Marshal's eLicensing, ePermit, and ePayment Portal
• Plans shall be accepted or rejected for review within 5 business days of receipt; a complete, accepted submittal is reviewed within 21 business days of acceptance (an additional 10 business days if the department requests more information, or the original 21 days, whichever is greater)
• Fire alarm and fire sprinkler plans are submitted as successive-phase plans after the initial building/electrical plan review is approved (W.S. 35-9-108(s))
• For remodeling costing under $40,000 that affects a built-in fire protection system, the plan-review fee is capped at $50/hour (W.S. 35-9-108(q)(ii)); larger projects and new construction are billed per the department's valuation-based fee schedule (Rules Ch. 2 §3), using the ICC Building Valuation Data table and a locally-calculated Permit Fee Multiplier — not a flat dollar figure
• After completion, WSFM inspects the system/building and, if compliant, issues a Certificate of Occupancy for newly constructed buildings or a Letter of Compliance for remodeled buildings before the space may be used or occupied (W.S. 35-9-108(n)); the underlying plan-review trigger in W.S. 35-9-108(a) applies mainly to public buildings, multistory public buildings, childcare centers over 10 children, and public bars/restaurants/theaters/churches/meeting places, not routine single-family construction

Required documents

• RequiredFire Protection System Plans & SpecificationsComplete plans/specs per the applicable WSFM Plan Review Checklist for the fire alarm, sprinkler, or suppression system, submitted via the eLicensing/ePermit portal

Fee schedule

Requirements

• A zoning permit is required for any change in the use of land or a structure, even where no construction is involved — confirmed both by the fee schedule's 'Establishment or Change of Use (No Construction)' line item and by §4.A.2's directive that the Department review all applications for 'construction, alteration, or change of use of land or structures'
• Submit the 'Use - Change or Establish' application form available from the Land Use Office
• The new use must be a permitted, conditional, or otherwise allowed use in the applicable zoning district under the 2015 Zoning Resolution
• Apply BEFORE the new use begins — the county assesses a Late Application Fee for a use established or changed before an approved permit application (2015 Zoning Resolution §H)
• This is a zoning-use approval, not a building-code Certificate of Occupancy — Sweetwater County has no county-level building-code CO program (see zoning-construction-permit); if the use change also involves new construction/remodeling of a building type subject to state fire/electrical plan review, a state Certificate of Occupancy or Letter of Compliance may separately be required from the WY State Fire Marshal (see fire-sprinkler-alarm-permit)

Required documents

• RequiredUse - Change or Establish ApplicationLand Use Department's zoning application for establishing a new use or changing an existing use of land/structure where no construction is involved

Fee schedule