Bonneville County, ID Building Safety: Building Permits (2026)

086 sets the trigger: anyone wanting to construct a building in the unincorporated county with a completed value of $100 or more must first apply to the Zoning Administrator, and the application must include a plat showing the size and location of existing and proposed buildings plus the zone the lot sits in. The only carve-out is a barn, corral, coop, pen, or other structure used exclusively for agricultural purposes valued under $100. 088 restates the prohibition more broadly, making it unlawful to erect, alter, reconstruct, or move any building or structure without a written permit from the Zoning Administrator, and authorizes the Board of County Commissioners to set a permit fee schedule tied to the value of the work.

01 adopts the 2018 International Building Code, 2018 International Residential Code (Parts I-VI and IX), 2018 International Energy Conservation Code, 2018 International Fuel Gas Code, 2018 International Mechanical Code, 2018 International Fire Code, 2018 International Existing Building Code, 2018 International Swimming Pool and Spa Code, the 2023 National Electric Code, and the 2017 Idaho State Plumbing Code, each with state amendments included. Agricultural buildings are exempt from those adopted codes but still must meet zoning placement requirements, and qualifying as an agricultural building depends on the IBC's own definition plus the County Assessor's determination that the land is actively devoted to agriculture under Idaho Code § 63-604.