Rock Springs building permits

Verified

Department contacts, adopted codes, permit types, fees, and gotchas for Rock Springs, Wyoming.

Last verified 2026-07-01 · Source

Building department

Address: 212 D Street, Rock Springs, WY 82901
Phone: (307) 352-1540
Email: webmaster@rswy.net
Office hours: Mon–Fri, 8:00 a.m. to 5:00 p.m., closed 12:30–1:30 p.m. for lunch
Website: Official site

Codes adopted

Wyoming has no statewide-mandated building code for general private construction. Under Wyoming Statute § 35-9-106, the Council on Fire Prevention and Electrical Safety in Buildings adopts minimum fire, building, mechanical, existing-building, and fuel-gas standards (not exceeding the International Codes), but § 35-9-121 makes local enforcement an opt-in delegation: a municipality or county must apply to the State Fire Marshal for local enforcement authority and adopt, by ordinance or resolution, standards equivalent to or more stringent than the state's — otherwise no local building code applies at all. In practice this produces exactly the fragmented picture that describes most of the state: some cities and counties (e.g., Laramie County, Natrona County) have adopted and enforce their own building codes, while many unincorporated county areas genuinely require no building permit for general construction. Electrical is different: under § 35-9-119(a)(i), the Chief Electrical Inspector (Wyoming State Fire Marshal's Office, Department of Fire Prevention and Electrical Safety) enforces the National Electrical Code statewide by default, EXCEPT in localities that have been separately granted their own certified electrical-enforcement authority under § 35-9-121(a) — so electrical permitting may be issued by the state program or by the local jurisdiction depending on which one currently holds delegated authority. Always confirm both the current building-code adoption status (if any) and which entity — state or local — issues the electrical permit with the specific jurisdiction before submitting plans.

2024 International Building Code (IBC) — with local amendments; adopted per Rock Springs Municipal Code § 150.04, including Appendix E, Appendix I and Appendix J, excluding Chapter 272024 International Residential Code (IRC) — with local amendments per § 150.04(D); including Appendix BF, Appendix B, Appendix C and Appendix CA; excluding R-309, P2904, and several Section R-403.3 subsections/tables/figures2024 International Existing Building Code (IEBC) — adopted per § 150.042024 International Mechanical Code (IMC) — with local amendment per § 150.04(C)2024 International Plumbing Code (IPC) — with local amendment per § 150.04(C); including Appendix D (Degree Day/Design Temperatures), Appendix E (Sizing of Water Pipe Systems) and Appendix C (Structural Safety)2024 International Fuel Gas Code (IFGC) — including Appendix A, Appendix B and Appendix C2024 International Fire Code (IFC) — per City of Rock Springs Building Ordinances pageNational Electrical Code, 2023 edition (NFPA) — adopted per § 150.04; enforced locally by the City Electrical Inspector under Rock Springs Municipal Code §§ 150.30–150.36 (city electrical code), NOT the Wyoming State Fire Marshal default program

Permit types & fees

Residential Building Permit (New Construction)

Required for new single-family dwellings and other one- and two-family residential construction within Rock Springs city limits. Governed by the 2024 IRC as adopted (with local amendments) by Rock Springs Municipal Code § 150.04. Single-family new construction is charged a flat permit fee rather than the valuation table.

Residential Addition / Remodel Permit

Required for additions, remodels, alterations, repairs, and detached garages on existing one- and two-family dwellings in Rock Springs. Charged at 50% of the general valuation-based fee table with no separate plan review fee.

Electrical Permit

Required for electrical wiring, alterations, and new installations within Rock Springs city limits. ISSUED BY THE CITY — Rock Springs holds delegated local electrical-enforcement authority under W.S. § 35-9-121 and runs its own City Electrical Inspector office (Rock Springs Municipal Code §§ 150.30–150.36), distinct from the Wyoming State Fire Marshal's default statewide electrical program. Per the WSFM 'LOCAL AND STATE JURISDICTIONS' chart (updated 5/11/2026), Rock Springs is listed ELEC INSP/PR = L/L.

Plumbing Permit

Required for plumbing installations, alterations, and repairs in Rock Springs. Governed by the 2024 International Plumbing Code (IPC) as adopted (with local amendments) by Rock Springs Municipal Code § 150.04. Charged under the general valuation-based building-permit fee schedule.

Mechanical / HVAC Permit

Required for heating, cooling, ventilation, and fuel gas installations in Rock Springs. Governed by the 2024 International Mechanical Code (IMC) and 2024 International Fuel Gas Code (IFGC) as adopted by Rock Springs Municipal Code § 150.04. Charged under the general valuation-based building-permit fee schedule.

Roofing Permit (Reroof)

Required for roof replacement (tear-off and reroof) on residential and commercial buildings in Rock Springs. Governed by the 2024 IBC/IRC as adopted by § 150.04. Residential reroofs are charged at 50% of the valuation table as a residential alteration; a Detail Sheet — Roof is available from the Building Inspection Office's Document Center.

Solar PV Permit

Required for installation of rooftop or ground-mounted solar photovoltaic systems in Rock Springs. Processed as a standard building permit under the 2024 IBC/IRC and 2023 NEC, subject to the general valuation-based fee schedule, with electrical inspection performed by the City Electrical Inspector.

Accessory Dwelling Unit (ADU) Permit

Rock Springs' Zoning Ordinance (Rock Springs Municipal Code Chapter 157) explicitly permits ACCESSORY DWELLINGS as a use in the R-2 Low Density Residential Zone (§ 157.086(A)(2)), with detailed development standards at § 157.086(B)(13). An accessory dwelling requires BOTH a zoning determination (that the property is properly zoned R-2, or another zone where the use is separately listed in the Table of Uses) and a standard residential building permit for construction.

Demolition Permit

Required for demolition of buildings or structures in Rock Springs. Charged a flat fee, and a dedicated 'Permit - Demolition' document is available from the Building Inspection Office's Document Center.

Commercial Tenant Improvement Permit

Required for interior remodels, additions, and tenant improvements in commercial buildings in Rock Springs. Governed by the 2024 IBC as adopted by § 150.04. Charged under the general valuation-based fee schedule; new projects/additions of 5,000 sq ft or larger trigger the full nonresidential checklist (Wyoming-licensed design professionals for architectural, structural, mechanical/plumbing, and electrical plans).

Tips & gotchas

Sweetwater County contains TWO incorporated cities that each run their own building AND electrical departments: Rock Springs (this page) and Green River (the county seat). They are entirely separate permitting jurisdictions with separate fee schedules — do not use Green River's permit data for a Rock Springs project or vice versa. Per the WSFM jurisdictions chart, unincorporated Sweetwater County outside both cities is state-jurisdiction (BLDG/ELEC = S/S) with no county building permit for private construction.
Rock Springs is one of the Wyoming cities that runs ITS OWN local electrical inspection program (City Electrical Inspector under Municipal Code §§ 150.30–150.36) rather than defaulting to the Wyoming State Fire Marshal's statewide electrical program — confirmed by the WSFM 'LOCAL AND STATE JURISDICTIONS' chart (ELEC INSP/PR = L/L) and the city's own ordinance creating the office.
The § 150.08 fee schedule explicitly states the IBC valuation-based fee table 'shall apply to all adopted codes unless specifically listed below' — meaning mechanical, plumbing, electrical, reroof, solar PV, ADU, and commercial tenant-improvement permits all use the SAME valuation table by default. The only carved-out overrides are: single-family homes (flat $1,100, no plan review), residential alterations/additions/detached garages (50% of table, no plan review), demolition ($35), excavation ($35), and mobile home permits in mobile home parks ($55).
Rock Springs has a Mine Subsidence Risk Map due to the area's coal-mining history — any parcel in a classified area needs a foundation design that specifically mitigates subsidence effects, with a statement from the design engineer on the plans. Contact City Engineering at (307) 352-1540 to check a parcel's classification before design work proceeds.
Rock Springs' Zoning Ordinance (Chapter 157) explicitly names and defines 'accessory dwellings' as a permitted use in the R-2 zone with detailed standards (§ 157.086(B)(13)) — this is a genuinely grounded ADU pathway, not an inferred one, though it applies only within the R-2 zone (confirm parcel zoning with Planning at 307-352-1540).
Detached accessory buildings/garages have a hard 1,500 sq ft combined cap without a conditional use permit (§ 157.129(D)-(E)); smaller structures (residential storage sheds/playhouses ≤200 sq ft roof area, decks ≤30 inches above grade, fences ≤6 ft, driveways) need only a Zoning Permit rather than a full building permit (§ 157.220).
Contractor registration ($125 fee + insurance certificate: $100k property damage, $100k bodily injury/death to one person, $250k to more than one person, City of Rock Springs named as certificate holder) is required before ANY work begins in the city — separate from any Wyoming state trade license.
Adopted design criteria for Rock Springs: 30 psf ground snow load, 115 mph ultimate wind speed (Exposure C), 42-inch minimum frost depth to bottom of footing — all from the City's own Building Ordinances page, confirmed via § 150.04's checklist-referenced values.
Restaurants/food service tenant improvements and new construction require a parallel submittal to the Sweetwater County Health Department in addition to the city building permit.