Commercial Building Permit (New Construction / Tenant Improvement) in Unincorporated Bonneville County, Idaho

Unincorporated Bonneville County requires a commercial building permit (new construction / tenant improvement) for: Building permit required for new commercial construction and for tenant-improvement/remodel/alteration work in existing commercial buildings, issued by Bonneville County Planning, Zoning, and Building under Bonneville County Code § 150.01; Bonneville County has no separately named 'tenant improvement' or 'TI' permit product: (a) Bonneville County Code Chapter 150 (§ 150.01) creates only one Building Permit category, with no TI-specific subsection; (b) Resolution No. 25-19's fee schedule (page 3) contains one 'Commercial Permits' valuation line and no separate TI/remodel/alteration fee item; (c) the county's 'Building & Zoning Applications' and 'Building Inspection' content pages both display 'No items found', so no TI-specific application or checklist is published there either. TI/remodel work in existing commercial space is submitted as a standard Building Permit application and reviewed under the 2018 IEBC (adopted at § 150.01(A)(7)) rather than the new-construction provisions of the 2018 IBC.; New commercial construction is reviewed under the 2018 IBC, plus the 2018 IECC, 2018 IFGC, 2018 IMC, 2018 IFC (with State Fire Marshal amendments), 2023 NEC, and 2017 Idaho State Plumbing Code, all adopted under § 150.01(A); Commercial permit valuation for the fee table is based on the project's actual Contract Price — confirmed from Resolution No. 25-19's 'Square Footage Values' table, which lists 'Commercial Permits: Contract Price' as its own row, distinct from the per-square-foot values used for a 'Residence.' Applicants should be prepared to document the contract/construction cost to establish this valuation.; The 2018 IBC as adopted includes State Building Code Board rules providing ADA and Federal Fair Housing Act accessibility-guideline equivalency (§ 150.01(A)(1)), applicable to commercial occupancies; Electrical and plumbing scopes of work on a commercial project are permitted and inspected directly by Bonneville County (as of January 20, 2026) rather than by the State of Idaho, the same change that applies to residential permits; If the adopted 2018 IFC requires a fire-sprinkler system for the occupancy, it is permitted separately as a 'Commercial Fire Sprinkler Permit' at a higher fee than the residential fire-sprinkler permit; Submit applications and schedule inspections through the county's online CityWorks PublicAccess permitting portal; Does not apply within the city limits of Idaho Falls, Ammon, Iona, Ucon, Ririe, Swan Valley, or Irwin, which operate their own separate commercial permit systems; Work commenced before permit issuance is subject to double permit fees per county policy. If your project isn't listed, confirm with Bonneville County Planning, Zoning, and Building Department at 208-524-7920 before starting work.

The same valuation-based fee table used for all building permits applies, but for commercial permits the 'Total Valuation' figure is the project's actual Contract Price rather than a county-assigned per-square-foot value (which is how residential valuation is computed). A separate, higher fee applies for a Commercial Fire Sprinkler Permit ($420.00) if the project requires one. All fees carry a 10% plan-review surcharge and a 5% software fee. Source: Bonneville County Resolution No. 25-19, 'Fee Schedule for Planning & Zoning Permits' and 'Specific Permit Fees' tables, read directly as a PDF 2026-08-02.

Unincorporated Bonneville County does not publish a plan-review timeline for this permit. Contact Bonneville County Planning, Zoning, and Building Department at 208-524-7920 for current turnaround.

You'll need: CityWorks PublicAccess Online Building Permit Application. See the required-documents checklist on this page for details on each.

Unincorporated Bonneville County requires 6 inspection(s) for a commercial building permit (new construction / tenant improvement), in order: Footing/Foundation, Framing, Electrical Rough-In, Plumbing Rough-In, Fire Sprinkler Rough-In/Final (if required), Final. Schedule each through Bonneville County Planning, Zoning, and Building Department (208-524-7920).

Apply through Bonneville County Planning, Zoning, and Building Department at 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). Official information: https://www.bonnevillecountyidaho.gov/planning-and-zoning.

Unincorporated Bonneville County, Idaho has adopted: 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). Local amendments apply — see the Unincorporated Bonneville County overview page for the full list.

No. Bonneville County Code Chapter 150 and the county's current fee schedule (Resolution No. 25-19) both confirm there is only one Building Permit product — TI/remodel work in an existing commercial building is submitted as a standard building permit and reviewed under the 2018 International Existing Building Code (IEBC) rather than the new-construction provisions of the 2018 IBC. Source: Bonneville County Code § 150.01(A)(7) and Resolution No. 25-19 fee schedule, both read directly 2026-08-02.