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Getting Your Site Plan Approved in Wyoming
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Site Plans approved in every county in every state
| County | Permit Authority | Site Plan Notes |
|---|---|---|
| Albany County | Albany County Planning & Zoning; City of Laramie Building Division (within city limits) | Laramie's Building Bulletin #3 outlines scaled site plan standards for new construction and site modifications, including layout, utilities, drainage, parking, and landscaping; plan review takes approximately three weeks. SWPPP required for sites disturbing one or more acres. |
| Big Horn County | Big Horn County Planning & Zoning; Wyoming State Fire Marshal (unincorporated areas) | Site plans typically required for new construction, additions, and accessory structures. Unincorporated areas fall under Wyoming State Fire Marshal jurisdiction for building code enforcement. |
| Campbell County | Campbell County Planning & Zoning; City of Gillette Building Department (within city limits) | Site plans required for new construction, room additions, accessory structures, and deck permits in Gillette and unincorporated Campbell County. SWPPP required for grading or construction disturbing one or more acres. |
| Carbon County | Carbon County Planning & Development; Wyoming State Fire Marshal (unincorporated areas) | Site plans typically required for new construction, additions, and accessory structures. Projects disturbing one or more acres require a DEQ stormwater permit and SWPPP. Verify current requirements with Carbon County Planning. |
| Converse County | Converse County Planning & Zoning; Wyoming State Fire Marshal (unincorporated areas) | Site plans typically required for new construction, additions, and accessory structures. Unincorporated areas are subject to Wyoming State Fire Marshal building code enforcement; verify local requirements with the county office. |
| Crook County | Crook County Planning & Zoning; Wyoming State Fire Marshal (unincorporated areas) | Site plans typically required for new construction, additions, and accessory structures. Unincorporated Crook County falls under Wyoming State Fire Marshal jurisdiction; confirm permit and site plan requirements directly with the county planning office. |
| Fremont County | Fremont County Planning & Zoning; Wyoming State Fire Marshal (unincorporated areas) | Site plans required for new construction, additions, accessory structures, and deck permits. SWPPP required for projects disturbing one or more acres. Verify requirements with Fremont County Planning or the applicable municipality (Lander, Riverton). |
| Goshen County | Goshen County Planning & Zoning; Wyoming State Fire Marshal (unincorporated areas) | Site plans typically required for new construction, additions, and accessory structures. HOA communities in Goshen County commonly require site plans for exterior changes including fences, decks, and additions prior to architectural approval. |
| Hot Springs County | Hot Springs County Planning & Zoning; Wyoming State Fire Marshal (unincorporated areas) | Site plans typically required for new construction, additions, and accessory structures. Unincorporated Hot Springs County falls under Wyoming State Fire Marshal jurisdiction for code enforcement; confirm requirements with the county office in Thermopolis. |
| Johnson County | Johnson County Planning & Zoning; Wyoming State Fire Marshal (unincorporated areas) | Site plans typically required for new construction, additions, and accessory structures. Projects disturbing one or more acres require a Wyoming DEQ stormwater permit and SWPPP. Verify requirements with Johnson County Planning in Buffalo. |
| Laramie County | Laramie County Planning & Development; City of Cheyenne Building Division (within city limits) | Cheyenne's Building Division requires a site plan for deck permits and enforces wind load design standards — sustained winds exceed 30 mph and frost depth reaches 42–48 inches. Laramie County Planning & Development handles all permitting and code enforcement for unincorporated areas. SWPPP required for sites disturbing one or more acres. |
| Lincoln County | Lincoln County Planning & Zoning; Wyoming State Fire Marshal (unincorporated areas) | Site plans typically required for new construction, additions, and accessory structures. HOA communities (common in resort and rural areas of Lincoln County) commonly require site plans for fences, decks, and exterior changes prior to architectural approval. |
| Natrona County | Natrona County Development Department; City of Casper Building Division (within city limits) | Casper defines a site plan as a scaled drawing showing the size, shape, and all existing and proposed features of the lot. A plot plan is required for all exterior work — decks, additions, and accessory structures. New single-family construction also requires a soils report and engineered foundation plan. All fences must comply with Chapter VII, Section 3 of the Zoning Resolution; a Zoning Certificate with a plot plan is required even for fence projects exempt from a full building permit. |
| Niobrara County | Niobrara County Planning & Zoning; Wyoming State Fire Marshal (unincorporated areas) | Site plans typically required for new construction, additions, and accessory structures. Niobrara is one of Wyoming's least-populated counties; unincorporated areas fall under Wyoming State Fire Marshal jurisdiction. Confirm current requirements with the county office in Lusk. |
| Park County | Park County Planning & Zoning; City of Cody Building Department (within city limits) | Park County Planning & Zoning handles site plan reviews, zoning, variances, and development standards for Cody and surrounding areas. The Wyoming Department of Fire Prevention & Electrical Safety (WDFPES) requires plan review for commercial alterations valued at $40,000 or more. Unincorporated Park County has not adopted a local building code, so state-level review applies to qualifying projects. |
| Platte County | Platte County Planning & Zoning; Wyoming State Fire Marshal (unincorporated areas) | Site plans typically required for new construction, additions, and accessory structures. SWPPP required for projects disturbing one or more acres under Wyoming DEQ rules. Confirm specific requirements with Platte County Planning in Wheatland. |
| Sheridan County | Sheridan County Planning & Zoning; City of Sheridan Building Department (within city limits) | Site plans required for new construction, additions, accessory structures, deck permits, and fence permits in Sheridan and unincorporated Sheridan County. HOA communities frequently require site plans for exterior modifications prior to architectural committee approval. |
| Sublette County | Sublette County Planning & Zoning; Wyoming State Fire Marshal (unincorporated areas) | Site plans typically required for new construction, additions, and accessory structures. Cold climate conditions and significant snow loads are relevant to footing and setback documentation. Confirm requirements with Sublette County Planning in Pinedale. |
| Sweetwater County | Sweetwater County Planning & Zoning; City of Rock Springs Building Department (within city limits) | Site plans required for new construction, additions, accessory structures, and deck permits in Rock Springs and Green River, as well as unincorporated Sweetwater County. SWPPP required for construction disturbing one or more acres under Wyoming DEQ rules. |
| Teton County | Teton County Community Development; Town of Jackson Building Department (within town limits) | Teton County has the strictest permitting requirements in Wyoming. Site plans are required for all permits; large parcels must submit two site plans — one showing the property in relation to adjacent parcels and one showing the proposed development at a smaller scale. Design must account for snow loads exceeding 80–100 psf. Environmental review requirements apply, and active code enforcement is standard throughout the county. |
| Uinta County | Uinta County Planning & Zoning; Wyoming State Fire Marshal (unincorporated areas) | Site plans typically required for new construction, additions, and accessory structures in Evanston and throughout Uinta County. Projects disturbing one or more acres require a Wyoming DEQ stormwater permit and SWPPP. Confirm current requirements with Uinta County Planning. |
| Washakie County | Washakie County Planning & Zoning; Wyoming State Fire Marshal (unincorporated areas) | Site plans typically required for new construction, additions, and accessory structures. Unincorporated Washakie County falls under Wyoming State Fire Marshal jurisdiction for code enforcement. Confirm permit and site plan requirements with the county office in Worland. |
| Weston County | Weston County Planning & Zoning; Wyoming State Fire Marshal (unincorporated areas) | Site plans typically required for new construction, additions, and accessory structures. Unincorporated Weston County falls under Wyoming State Fire Marshal jurisdiction. Confirm requirements with the county office in Newcastle before submitting permit applications. |