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

Required for new commercial construction and for alteration/tenant-improvement (TI) work in existing commercial buildings in unincorporated Bonneville County. Bonneville County Code § 150.01 does not create a legally distinct 'commercial' permit type or a separate TI permit — commercial and TI projects go through the same Building Permit process as residential projects (same Chapter 150, same CityWorks PublicAccess portal, same Planning, Zoning, and Building Department), governed by the 2018 IBC for new construction and the 2018 IEBC for alterations/additions to existing buildings. What IS confirmed as distinct from residential, from Bonneville County Resolution No. 25-19 (the county's live fee schedule, read directly as a PDF on 2026-08-02): (1) commercial projects are valued for fee purposes at the project's actual Contract Price, not via the county's per-square-foot residential valuation schedule, and (2) there is a separate, higher 'Commercial Fire Sprinkler Permits' fee ($420.00) distinct from the residential fire-sprinkler fee ($210.00). As of January 20, 2026, Bonneville County also processes electrical and plumbing permits and inspections in-house for commercial projects, the same as for residential.

Reviewed 2026-08-02 · Source

When you need this permit

  • 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
  • CONFIRMED ABSENCE: Bonneville County has no separately named 'tenant improvement' or 'TI' permit product. Checked directly: (a) Bonneville County Code Chapter 150 (§ 150.01, read in full 2026-08-02) creates only one Building Permit category, with no TI-specific subsection; (b) Resolution No. 25-19's fee schedule (read directly as a PDF, page 3, 2026-08-02) 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 returned 'No items found' when fetched directly on 2026-08-02, 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

Required documents

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Fee schedule

Building Permit Fee (Total Valuation $0 to $2,000)Bonneville County Resolution No. 25-19, 'Fee Schedule for Planning & Zoning Permits' table (Instrument #1797567, recorded 09/23/2025, effective 10/1/2025), read directly as a PDF 2026-08-02. Same valuation-fee table used for all Building Permit fee schedule permits; for commercial permits, the 'Total Valuation' input is the project's Contract Price rather than the county's per-square-foot residential schedule (Resolution 25-19, 'Square Footage Values' table, 'Commercial Permits: Contract Price' row).
$113
Building Permit Fee (Total Valuation $2,001 to $30,000)Resolution 25-19, Fee Schedule for Planning & Zoning Permits; valuation = Contract Price for commercial permits
$120 for the first $2,000 plus $17.50 for each additional $1,000 or fraction thereof, to and including $30,000
Building Permit Fee (Total Valuation $30,001 to $60,000)Resolution 25-19, Fee Schedule for Planning & Zoning Permits; valuation = Contract Price for commercial permits
$615 for the first $30,001 plus $16.25 for each additional $1,000 or fraction thereof, to and including $60,000
Building Permit Fee (Total Valuation $60,001 to $100,000)Resolution 25-19, Fee Schedule for Planning & Zoning Permits; valuation = Contract Price for commercial permits
$1,110 for the first $60,001 plus $11.50 for each additional $1,000 or fraction thereof, to and including $100,000
Building Permit Fee (Total Valuation $100,001 and up)Resolution 25-19, Fee Schedule for Planning & Zoning Permits; valuation = Contract Price for commercial permits
$1,595 for the first $100,001 plus $8.10 for each additional $1,000 or fraction thereof
Commercial Permits (valuation basis)Resolution 25-19, 'Square Footage Values' table — read directly as a PDF (page 3) 2026-08-02: 'Commercial Permits ... Contract Price,' listed alongside per-square-foot residential values (Residence Each Floor $60.00, Finished Basement $20.00, etc.), confirming commercial valuation is computed differently from residential
Contract Price
Commercial Fire Sprinkler PermitsResolution 25-19, 'Specific Permit Fees' table — read directly as a PDF (page 3) 2026-08-02. Distinct line item from 'Residential Fire Sprinkler Permits' ($210.00); applies when the adopted 2018 IFC requires a sprinkler system for the occupancy
$420.00
Minimum Inspection Fee For All CodesResolution 25-19, 'Specific Permit Fees' table
$105.00
Minimum Reinspection FeeResolution 25-19, 'Specific Permit Fees' table
$105.00
Electrical or Plumbing InspectionResolution 25-19, 'Specific Permit Fees' table — this line item predates the county's January 20, 2026 takeover of electrical/plumbing permitting from the State of Idaho, so it is quoted verbatim rather than assumed to be the full current electrical/plumbing permit fee for a commercial project; call ahead to confirm how it applies post-takeover
$105.00
Surcharges applied to permits aboveQuoted verbatim from Resolution 25-19: '*Each permit is subject to a ten percent (10%) plan review fee, and a five percent (5%) Software fee.'
10% plan review fee + 5% Software fee

Review timeline

Plan review
Not published — contact the department

How long did your Commercial Building Permit (New Construction / Tenant Improvement) permit actually take in Unincorporated Bonneville County?

Anonymous — one question, no email. Answers are combined and only shown once at least 5 people have reported.

Inspection process

  1. 1

    Footing/Foundation

    Before concrete placement — verify excavation, forms, and reinforcement per 2018 IBC (new construction) or 2018 IEBC (alterations)

  2. 2

    Framing

    After framing, sheathing, and rough electrical/plumbing/mechanical trades complete — before insulation or wall cover

  3. 3

    Electrical Rough-In

    County-administered as of January 20, 2026 under the 2023 NEC — required before wall cover

  4. 4

    Plumbing Rough-In

    County-administered as of January 20, 2026 under the 2017 Idaho State Plumbing Code — required before wall cover

  5. 5

    Fire Sprinkler Rough-In/Final (if required)

    Applies when the adopted 2018 IFC requires a fire-sprinkler system for the occupancy; permitted and fee-assessed separately as a Commercial Fire Sprinkler Permit ($420.00)

  6. 6

    Final

    All work complete per approved plans; final building, electrical, and plumbing sign-off issued by Bonneville County

See the full Unincorporated Bonneville County inspection guide — scheduling & re-inspection fees →

Tips

  • There is no separate 'tenant improvement' or 'TI' permit in Bonneville County — remodel/alteration work in existing commercial space uses the same Building Permit application as new commercial construction, just reviewed under the 2018 IEBC instead of the 2018 IBC's new-construction provisions.
  • Commercial permit fees are calculated from the project's actual Contract Price, not a county-assigned per-square-foot value like residential projects use — be ready to provide contract/cost documentation when applying.
  • If your project needs a fire-sprinkler system under the adopted 2018 IFC, budget for the separate Commercial Fire Sprinkler Permit fee ($420.00), which is double the residential fire-sprinkler fee ($210.00).
  • As of January 20, 2026, apply for and schedule electrical and plumbing inspections on the same CityWorks PublicAccess portal as the building permit — Bonneville County no longer routes these trades to the State of Idaho for commercial projects either.
  • Confirm your parcel is actually in unincorporated county jurisdiction before applying — Idaho Falls, Ammon, Iona, Ucon, Ririe, Swan Valley, and Irwin all run their own separate commercial permit systems.
  • No published turnaround/SLA figure exists for commercial or TI review specifically; call Planning, Zoning, and Building at 208-524-7920 or bonnevillebuilding@gmail.com for a current estimate before planning a project timeline.

Frequently asked questions

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; CONFIRMED ABSENCE: Bonneville County has no separately named 'tenant improvement' or 'TI' permit product. Checked directly: (a) Bonneville County Code Chapter 150 (§ 150.01, read in full 2026-08-02) creates only one Building Permit category, with no TI-specific subsection; (b) Resolution No. 25-19's fee schedule (read directly as a PDF, page 3, 2026-08-02) 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 returned 'No items found' when fetched directly on 2026-08-02, 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.

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