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Residential Building Permit (New Construction / Addition) in Unincorporated Bonneville County, Idaho

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.

Reviewed 2026-07-23 · Source

When you need this permit

  • Building permit required for new residential construction, additions, and structural alterations in unincorporated Bonneville County
  • Submit application through the county's online CityWorks PublicAccess permitting portal
  • Construction must comply with the 2018 IBC, 2018 IRC (Parts I-VI and IX), 2018 IECC, 2018 IFGC, 2018 IMC, 2018 IEBC (for alterations to existing buildings), 2023 NEC, and 2017 Idaho State Plumbing Code as adopted under Bonneville County Code § 150.01
  • Electrical and plumbing scopes of work on the same project are now permitted and inspected directly by Bonneville County (as of 1-20-2026) rather than by the State of Idaho
  • Agricultural buildings are exempt from the building code itself but must still meet zoning placement/setback rules and the IBC § 202 agricultural-building definition plus County Assessor confirmation of agricultural-use land under Idaho Code § 63-604 to qualify for the exemption
  • Work commenced before permit issuance is subject to double permit fees

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, recorded as Instrument #1797567 (09/23/2025), effective 10/1/2025 — the current, live fee schedule (supersedes Resolution 24-12; no later resolution supersedes 25-19 as of this verification). Covers building permits, including the residential building permit.
$113
Building Permit Fee (Total Valuation $2,001 to $30,000)Resolution 25-19, Fee Schedule for Planning & Zoning 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
$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
$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
$1,595 for the first $100,001 plus $8.10 for each additional $1,000 or fraction thereof
Square Footage Values (used to compute Total Valuation for the fee table above)Resolution 25-19, 'Square Footage Values' table beneath the valuation fee schedule
Residence, each floor: $60.00/sq ft; Finished Basement: $20.00/sq ft; Unfinished Basement: $10.00/sq ft; Garage, Shed and Outbuilding: $20.00/sq ft; Covered Patio and Carport: $10.00/sq ft; Crawl Space and Uncovered Patio: $5.00/sq ft
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; call ahead to confirm how it applies post-takeover
$105.00
Residential Fire Sprinkler PermitsResolution 25-19, 'Specific Permit Fees' table
$210.00
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 Residential Building Permit (New Construction / Addition) 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/IRC

  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

    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

  • As of January 20, 2026, apply for and schedule inspections for electrical and plumbing work on the same CityWorks PublicAccess portal as the building permit — Bonneville County no longer routes these trades to the State of Idaho. Projects permitted before January 20, 2026 keep their state-inspected trades through completion.
  • Agricultural buildings are exempt from the building code, but the exemption requires BOTH meeting the IBC § 202 definition of an agricultural building AND County Assessor confirmation the parcel is actively devoted to agriculture under Idaho Code § 63-604 — zoning placement/setback rules still apply regardless.
  • Beginning construction before the permit is issued triggers a double permit fee.
  • Planning, Zoning, and Building relocated to 357 Constitution Way, Idaho Falls (as of November 25, 2025); mailing address remains 605 N Capital Ave.
  • The county's Building Permit & Zoning Fees content-listing page itself is not populated with a static PDF, but the actual fee schedule is published as Resolution No. 25-19 (recorded 09/23/2025, effective 10/1/2025) on the county's official Resolutions page (bonnevillecountyidaho.gov/page/resolutions, hosted via Dropbox) — a valuation-based table plus flat fees for specific permit types, subject to a 10% plan-review surcharge and 5% software fee. Confirm with (208) 524-7920 / bonnevillebuilding@gmail.com how the electrical/plumbing line items apply now that the county (not DOPL) issues those permits.

Frequently asked questions

Unincorporated Bonneville County requires a residential building permit (new construction / addition) for: Building permit required for new residential construction, additions, and structural alterations in unincorporated Bonneville County; Submit application through the county's online CityWorks PublicAccess permitting portal; Construction must comply with the 2018 IBC, 2018 IRC (Parts I-VI and IX), 2018 IECC, 2018 IFGC, 2018 IMC, 2018 IEBC (for alterations to existing buildings), 2023 NEC, and 2017 Idaho State Plumbing Code as adopted under Bonneville County Code § 150.01; Electrical and plumbing scopes of work on the same project are now permitted and inspected directly by Bonneville County (as of 1-20-2026) rather than by the State of Idaho; Agricultural buildings are exempt from the building code itself but must still meet zoning placement/setback rules and the IBC § 202 agricultural-building definition plus County Assessor confirmation of agricultural-use land under Idaho Code § 63-604 to qualify for the exemption; Work commenced before permit issuance is subject to double permit fees. If your project isn't listed, confirm with Bonneville County Planning, Zoning, and Building Department at 208-524-7920 before starting work.

In Unincorporated Bonneville County, the published Building Permit Fee (Total Valuation $0 to $2,000) is: $113. Additional published fees: Building Permit Fee (Total Valuation $2,001 to $30,000) — $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) — $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) — $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) — $1,595 for the first $100,001 plus $8.10 for each additional $1,000 or fraction thereof; Square Footage Values (used to compute Total Valuation for the fee table above) — Residence, each floor: $60.00/sq ft; Finished Basement: $20.00/sq ft; Unfinished Basement: $10.00/sq ft; Garage, Shed and Outbuilding: $20.00/sq ft; Covered Patio and Carport: $10.00/sq ft; Crawl Space and Uncovered Patio: $5.00/sq ft; Minimum Inspection Fee For All Codes — $105.00; Minimum Reinspection Fee — $105.00; Electrical or Plumbing Inspection — $105.00; Residential Fire Sprinkler Permits — $210.00; Surcharges applied to permits above — 10% plan review fee + 5% Software fee. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

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 5 inspection(s) for a residential building permit (new construction / addition), in order: Footing/Foundation, Framing, Electrical Rough-In, Plumbing Rough-In, 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.

As of January 20, 2026, Bonneville County processes electrical and plumbing permits and performs the related inspections directly — the State of Idaho no longer provides these services in the county's jurisdiction. Apply through the county's CityWorks PublicAccess portal. If your permit was issued before January 20, 2026, the state will continue inspecting that specific project's electrical/plumbing work until it's finalized. Source: Bonneville County News, 'Electrical and Plumbing Permits,' bonnevillecountyidaho.gov, and Planning and Zoning Director Naysha Foster via LocalNews8/KIFI, February 3, 2026.

The structure is exempt from the county's adopted Building Codes if it meets the IBC § 202 definition of an agricultural building AND the County Assessor has determined the parcel is land actively devoted to agriculture under Idaho Code § 63-604. Zoning placement and setback requirements still apply even when the building-code exemption applies. Source: Bonneville County Code § 150.01(C).

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