The county handles building permits for all unincorporated areas, while incorporated municipalities like Rapid City and Box Elder maintain their own independent building departments and permitting processes. Development within the county is subject to specific zoning districts, including significant hillside and flood hazard area regulations that require additional site plan review.
The county enforces a strict Hillside Development District ordinance that mandates geotechnical reports and specific slope stabilization measures for any construction on steep terrain.
How this fits with the state
The state authority here is South Dakota state trade boards; local building departments. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.
Source · Pennington County Planning and DevelopmentLast verified · 05 / 2026