Unincorporated Bonneville County building permits

Building department

Address

357 Constitution Way, Idaho Falls, ID 83402 (mailing: 605 N Capital Ave, Idaho Falls, ID 83402)

Phone

208-524-7920

Email

bonnevillebuilding@gmail.com

Office hours

Mon–Fri 8:00 AM – 5:00 PM (excluding holidays)

Website

Official site

Permit portal

Apply online at Unincorporated Bonneville County's portal

Inspection guide

See how inspections work in Unincorporated Bonneville County — sequence, scheduling & re-inspection fees.

Codes adopted

Idaho adopts a statewide baseline building code set under the Idaho Building Code Act (Idaho Code Title 39, Chapter 41) and IDAPA rules administered by the Idaho Division of Occupational and Professional Licenses (DOPL). Effective January 1, 2021, the statewide baseline includes the 2018 International Building Code (IBC), 2020 Idaho Residential Code (based on the 2018 IRC Parts I–III and IX with Idaho amendments), 2020 Idaho Energy Conservation Code (based on the 2018 IECC with Idaho amendments), 2018 International Existing Building Code (IEBC), 2018 International Mechanical Code (IMC), 2018 International Fuel Gas Code (IFGC), and 2018 International Fire Code (IFC). The National Electrical Code is adopted separately by the Idaho Electrical Board (IDAPA 24.39.10), not bundled with the building code: Idaho enforces the 2023 NEC, effective July 1, 2024 (the state used the 2017 NEC with amendments before that and skipped the 2020 edition). Local jurisdictions must enforce the state baseline and may adopt amendments only where those amendments are at least as stringent as the state-adopted editions; local amendments may not be less restrictive. Enforcement is local — each city or county issues permits and performs inspections. Always confirm the current adopted edition and any local amendments with your specific jurisdiction before submitting plans.

• 2018 International Building Code (IBC), including ADA/Federal Fair Housing Act accessibility equivalency rules promulgated by the State Building Code Board — adopted via Bonneville County Code § 150.01(A)(1)
• 2018 International Residential Code (IRC), Parts I-VI and IX — § 150.01(A)(2)
• 2018 International Energy Conservation Code (IECC) — § 150.01(A)(3)
• 2018 International Fuel Gas Code (IFGC) — § 150.01(A)(4)
• 2018 International Mechanical Code (IMC) — § 150.01(A)(5)
• 2018 International Fire Code (IFC), including State Fire Marshal amendments and Appendices B, C, D, E, and F — § 150.01(A)(6)
• 2018 International Existing Building Code (IEBC) — § 150.01(A)(7)
• 2018 International Swimming Pool and Spa Code (ISPSC) — § 150.01(A)(8)
• 2023 National Electrical Code (NEC) — § 150.01(A)(9)
• 2017 Idaho State Plumbing Code — § 150.01(A)(10)

Permit types & fees

• Residential Building Permit (New Construction / Addition)

  Required for new single-family dwellings, additions, and structural alterations in unincorporated Bonneville County, governed by the 2018 IRC/IBC and related codes adopted under Bonneville County Code § 150.01. The Planning, Zoning, and Building Department (Planning and Zoning Director Naysha Foster) administers plan review and inspections. As of January 20, 2026, the county also administers electrical and plumbing permits/inspections for the same project in-house rather than routing them to the state. Applications and inspection scheduling are submitted through the county's online CityWorks PublicAccess permitting portal.

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• Solar Photovoltaic (PV) Permit

  Required for installation of rooftop or ground-mount solar photovoltaic systems in unincorporated Bonneville County. As of January 20, 2026, Bonneville County took over processing of electrical and plumbing permits (and inspections) within the county's jurisdiction — a function previously performed by the State of Idaho. This makes Bonneville County one of the few counties in this database that now self-administers BOTH the building/structural AND electrical portions of a solar installation, rather than routing electrical work to DOPL. No published fee schedule (for either the building or the new electrical permit function) or solar-specific fee line item could be located as of this review — a genuine, recently-created gap rather than an omission.

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• EV Charger / EVSE Electrical Permit

  Installation of an electric vehicle charging station (EVSE) in unincorporated Bonneville County requires an electrical permit. As of January 20, 2026, Bonneville County processes electrical permits and performs electrical inspections directly, in-house — the State of Idaho (previously via DOPL/Division of Building Safety) no longer provides this service here, making Bonneville the only Idaho county in this database to self-administer electrical permitting rather than routing it to DOPL. RE-CHASED 2026-07-23: the county's current fee schedule, Resolution No. 25-19 (Instrument #1797567, recorded 09/23/2025, effective 10/1/2025), is published on the county's official Resolutions page (bonnevillecountyidaho.gov/page/resolutions) — a scanned PDF with no text layer, missed by prior checks of the separate 'Building Permit & Zoning Fees' content page. It lists an 'Electrical or Plumbing Inspection' fee of $105.00 and a 'Minimum Inspection Fee For All Codes' of $105.00, each subject to a 10% plan-review and 5% software surcharge. This resolution predates the January 20, 2026 electrical-permitting takeover, so the figures are quoted as the documented, currently-in-force fee schedule rather than confirmed as unchanged for the new electrical-permit function specifically — applicants should still call ahead to confirm.

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