Regulatory framework
The code baseline for Custer County.
N/A for a specific 2026 IRC/IBC edition. The County's 2026-revised Zoning Resolution governs development and building requirements in unincorporated Custer County, including zoning permits before excavation, construction, reconstruction, or square-footage-increasing remodels; the reviewed materials do not identify a separate technical building-code edition.
Inspection lane
For compliance inspections, the applicant calls the Planning and Zoning Office after the applicable criteria are met and the office schedules the inspection. The County's 2026 Zoning Resolution authorizes inspections for suspected violations and requires septic systems to have a prior septic permit; septic permits include inspections, with additional septic inspection trips charged at $75 when the system is not ready or fails inspection.