Regulatory framework
The code baseline for Washington County.
Washington County adopted the 2018 International Residential Code for residential dwellings. The county zoning office also administers stormwater, floodplain, zoning, planning, and other building-code requirements; its public page does not identify a separate current commercial code edition.
Inspection lane
Submit the application and required septic and driveway documentation; typical new residential construction does not require plans according to the county FAQ. All inspections must be scheduled by 3:00 p.m. the prior day by calling 423-753-1753; the county addendum says next-day site service is available when requested before 3:00 p.m. The applicant must call for required inspections and final approval, and permits become invalid if work does not start or inspections are not requested for 180 days.