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Residential Building Permit — Unincorporated Washington County, Utah · Requirements sheet
Verified 2026-06-30 · Source: https://www.washco.utah.gov/departments/community-development/fees/
PermitBase is an independent reference and is not affiliated with any government agency. Requirements change and vary by project — confirm current details with the building department before you submit.
Residential Building Permit in Unincorporated Washington County, Utah
Required for new residential construction, additions, and structural alterations in unincorporated Washington County. Permit fees are valuation-based per the Washington County Community Development fee schedule. Applications are accepted electronically only through the county's online permitting portal. Building Official: Kurt Dampf.
Verified 2026-06-30 · Source
When you need this permit
- New single-family or multi-family residential construction
- Additions or structural modifications to existing structures
- Conversion of non-habitable to habitable space
- Work valued over $500 requiring plan review under adopted codes
Required documents
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Fee schedule
Building Permit — valuation $1.00–$500.00Washington County Community Development Fees page (washco.utah.gov/departments/community-development/fees/), verified June 30, 2026. No ordinance number is referenced on the fee schedule page.
$23.50
Building Permit — valuation $501.00–$2,000.00Washington County Community Development Fees page, verified June 30, 2026.
$23.50 for the first $500.00 plus $3.05 for each additional $100.00 or fraction thereof, to and including $2,000.00
Building Permit — valuation $2,001.00–$25,000.00Washington County Community Development Fees page, verified June 30, 2026.
$69.25 for the first $2,000.00 plus $14.00 for each additional $1,000.00 or fraction thereof, to and including $25,000.00
Building Permit — valuation $25,001.00–$50,000.00Washington County Community Development Fees page, verified June 30, 2026.
$391.75 for the first $25,000.00 plus $10.10 for each additional $1,000.00 or fraction thereof, to and including $50,000.00
Building Permit — valuation $50,001.00–$100,000.00Washington County Community Development Fees page, verified June 30, 2026.
$643.75 for the first $50,000.00 plus $7.00 for each additional $1,000.00 or fraction thereof, to and including $100,000.00
Building Permit — valuation $100,001.00–$500,000.00Washington County Community Development Fees page, verified June 30, 2026.
$993.75 for the first $100,000.00 plus $5.60 for each additional $1,000.00 or fraction thereof, to and including $500,000.00
Building Permit — valuation $500,001.00–$1,000,000.00Washington County Community Development Fees page, verified June 30, 2026.
$3,233.75 for the first $500,000.00 plus $4.75 for each additional $1,000.00 or fraction thereof, to and including $1,000,000.00
Building Permit — valuation $1,000,001.00 and upWashington County Community Development Fees page, verified June 30, 2026.
$5,608.75 for the first $1,000,000.00 plus $3.65 for each additional $1,000.00 or fraction thereof
State SurchargeWashington County Community Development Fees page, verified June 30, 2026.
1% of the building permit fee
Special Inspections (outside normal business hours)Washington County Community Development Fees page, verified June 30, 2026.
$100.00 per hour (minimum two hours)
Re-Inspection FeeWashington County Community Development Fees page — 'Re-inspection fees assessed under provisions of section 305.8: $100.00 per hour', verified June 30, 2026.
$100.00 per hour (minimum one hour)
Plan review required by changes/revisions to approved plansWashington County Community Development Fees page, verified June 30, 2026.
$100.00 per hour (minimum one-half hour)
Review timeline
Plan reviewTypical estimate — confirm current times with the Unincorporated Washington County building department
~10–21 business days
Inspection process
- 1
Foundation / Footing
Before concrete pour — verify excavation, forms, rebar, and anchor bolts
- 2
Framing
After framing, sheathing, and rough-in MEP — before insulation or wall cover
- 3
Insulation
After insulation installed, before drywall
- 4
Final
All work complete — certificate of occupancy issued upon passing
See the full Unincorporated Washington County inspection guide — scheduling & re-inspection fees →
Tips
- Washington County requires 24-hour advance notice after work is completed and ready for inspection. A permit number is required when scheduling.
- Applications are accepted electronically only through outpost.washco.utah.gov — paper applications are not accepted.
- Valuation is calculated as square footage times average cost per sq ft. Contact Community Development at (435) 301-7250 to confirm the current average cost figure used for valuation.
- A 4-yard-capacity covered dumpster AND a portable sanitary facility (porta-pottie) are both required at the construction site during all phases of construction per Washington County policy.
- Fire special service district impact fees must be paid and the receipt submitted before the building permit is issued — confirm the applicable district with Community Development.
Frequently asked questions
Unincorporated Washington County requires a residential building permit for: New single-family or multi-family residential construction; Additions or structural modifications to existing structures; Conversion of non-habitable to habitable space; Work valued over $500 requiring plan review under adopted codes. If your project isn't listed, confirm with Washington County Community Development Department (Building Division) at (435) 301-7250 before starting work.
Building permit fees are valuation-based per the Washington County Community Development fee schedule (washco.utah.gov/departments/community-development/fees/): $23.50 for work valued at $500 or less, scaling to $5,608.75 plus $3.65 per additional $1,000 over $1,000,000. A 1% state surcharge applies to all building permit fees. Re-inspection and out-of-hours inspection fees are $100/hour.
Plan review for a residential building permit in Unincorporated Washington County typically runs 10–21 business days. This is an estimate, not a published figure — confirm current review times with Washington County Community Development Department (Building Division) at (435) 301-7250.
You'll need: Online Permit Application; Engineering Plans; Site Plan; Geotechnical Report; REScheck Energy Compliance Report; Septic Permit; Proof of Water; HCP Agreement; Culvert Letter; Fire Special Service District Impact Fee Receipt. Depending on your project, Unincorporated Washington County may also ask for: Engineered Truss Plans; Owner-Builder Certification. See the required-documents checklist on this page for details on each.
Unincorporated Washington County requires 4 inspection(s) for a residential building permit, in order: Foundation / Footing, Framing, Insulation, Final. Schedule each through Washington County Community Development Department (Building Division) ((435) 301-7250).
Washington County only accepts building permit applications electronically through its online portal at outpost.washco.utah.gov/apps/community-development/building-permit/residential.php. Once submitted, the system sends you a link to check application status. Contact Community Development at (435) 301-7250 with questions.
Unincorporated Washington County, Utah has adopted: 2024 International Building Code (IBC), including Appendices C and J — CURRENT statewide as of 7/1/2026 per Utah Code § 15A-2-103(1)(a); supersedes the 2021 edition previously listed here; 2021 International Residential Code (IRC) — Utah Code § 15A-2-103(1)(b); REMAINS CURRENT, UNCHANGED by the 7/1/2026 amendment; Appendix AQ of the 2021 IRC — statewide per Utah Code § 15A-2-103(1)(c); not itemized on any Washington County page found, added here per statute; 2024 International Plumbing Code (IPC) — CURRENT statewide as of 7/1/2026 per Utah Code § 15A-2-103(1)(d); supersedes the 2021 edition previously listed here; 2024 International Mechanical Code (IMC) — CURRENT statewide as of 7/1/2026 per Utah Code § 15A-2-103(1)(e); supersedes the 2021 edition previously listed here; 2024 International Fuel Gas Code (IFGC) — CURRENT statewide as of 7/1/2026 per Utah Code § 15A-2-103(1)(f); supersedes the 2021 edition previously listed here; 2023 National Electrical Code (NEC) — Utah Code § 15A-2-103(1)(g); UNCHANGED by the 7/1/2026 amendment (NOTE: Washington County's own website has been observed referencing 2020 NEC on older pages; the legally in-force statewide edition is 2023 NEC — no county page is known to have been updated to reflect this); 2024 International Energy Conservation Code (IECC), single unsplit statewide edition — CURRENT statewide as of 7/1/2026 per Utah Code § 15A-2-103(1)(h); supersedes the 2021 edition previously listed here; 2024 International Existing Building Code (IEBC) — CURRENT statewide as of 7/1/2026 per Utah Code § 15A-2-103(1)(i); supersedes the 2021 edition previously listed here; Residential provisions of the 2024 International Swimming Pool and Spa Code (ISPSC) — CURRENT statewide as of 7/1/2026 per Utah Code § 15A-2-103(1)(n); supersedes the 2021 edition previously listed here; MBI 1200 and MBI 1205 (manufactured/modular construction standards) — statewide per Utah Code § 15A-2-103(1)(o); not itemized on any Washington County page found, added here per statute; NOTE (2026-07-16 re-verification): The Utah Code § 15A-2-103 version effective 7/1/2026 (superseded 1/1/2027) took effect 15 days before this re-verification. This entry previously described the 2024-cycle codes in future tense ('effective through June 30, 2026' / 'takes effect July 1, 2026'); that date has now passed, so IBC/IPC/IMC/IFGC/IECC/IEBC/residential ISPSC are now stated as CURRENT (2024 editions), while IRC (2021) and NEC (2023) remain unchanged as already correctly stated. No Washington County page listing IBC/IRC/IPC/IMC/IECC editions specifically was found on live re-check of the Community Development FAQ and Building Permit Documents pages (2026-07-16), so there is no city-page lag to record for those codes beyond the pre-existing NEC observation above..
Sources & verification
Verified against official sources. Last reviewed 2026-06-30.
Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Unincorporated Washington County building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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