Regulatory framework
The code baseline for Wapello County.
For unincorporated Wapello County, current Chapter 43 (Construction and Property Maintenance Code, effective January 1, 2026) adopts the current editions of the International Building Code, International Residential Code, International Property Maintenance Code, National Electrical Code, International Mechanical Code, International Plumbing Code, International Private Sewage Disposal Code, International Fire Code, and International Fuel Gas Code, with county modifications; energy conservation must meet Iowa-mandated codes, and Iowa Administrative Code 567 Chapter 69 is the primary on-site-wastewater code. The county page does not state edition years for the current 2026 adoptions. The county also enforces Chapter 40 zoning, Chapter 36 floodplain, Chapter 41 subdivision, and related land-use rules. The construction code generally does not apply inside incorporated cities unless a 28E agreement gives the county authority.