Residential Building Permit (New Construction) in Unincorporated Natrona County, Wyoming
VerifiedRequired for new single-family dwellings and other new one- and two-family residential construction in unincorporated Natrona County. Reviewed under the 2024 IRC as adopted by the Natrona County Building Department (Resolution 90-24).
Verified 2026-07-01 · Source
When you need this permit
- Building permit application (Residential or Commercial) submitted to the Natrona County Building Department, in person, by mail, or online via ViewPointCloud
- Specify building type (Single Family Dwelling, Multifamily, IRC/Manufactured, HUD/Mobile Home, Commercial/Industrial), construction type (Concrete/Block, Steel, Heavy Timber, Stick Frame, Post Frame/Pole Barn), and foundation type (Crawl Space, Basement, Caissons/Piers, Concrete Slab, Shallow Monolithic)
- Water and sewer source must be identified (Public/Septic, Public/Well) — septic requires coordination with Casper-Natrona County Health Department
- Job/market valuation of work must be declared on the application — this determines the permit fee under the county's valuation-based fee table
- Contractor performing work must hold a current Natrona County contractor license (Class I, II, or III General Contractor) with active insurance on file; permits will not be approved if the contractor's license or insurance has expired
- Applicant acknowledges compliance with all Natrona County adopted Building Codes and State laws, and that the building does not violate any restrictive covenant
Required documents
- Req
Natrona County Building Permit Application (Residential or Commercial, 2025 form)
Single combined form for residential and commercial new construction, remodel, addition, and repair; requires property owner/applicant/contractor info, building/construction/foundation type, bedroom/bathroom count, sewer/water type, dimensions, and job valuation
- Req
Site Plan Application (2025)
Site plan showing property lines, setbacks, and proposed structure location, required per Natrona Next Zoning Resolution dimensional standards for the applicable zoning district
- Opt
Address Request Form (if address not yet assigned)
Required if the parcel does not yet have an assigned situs address; permit application requires either an address or parcel number and legal description
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee — valuation $0–$2,500 | $70 | Natrona County Permit Fees, Resolution No. 45-20 (effective January 2024–current) |
| Building Permit Fee — valuation $2,501–$5,000 | $100 | — |
| Building Permit Fee — valuation $5,001–$7,500 | $170 | — |
| Building Permit Fee — valuation $7,501–$12,500 | $233 | — |
| Building Permit Fee — valuation $12,501–$17,500 | $294 | — |
| Building Permit Fee — valuation $17,501–$22,500 | $356 | — |
| Building Permit Fee — valuation $47,501–$52,500 | $627 | Table continues in $5,000 valuation bands from $22,500 up to $98,000 — see full Resolution 45-20 table for all bands |
| Building Permit Fee — valuation $92,501–$98,000 | $905 | — |
| Building Permit Fee — valuation over $98,000 | $905 plus $9.24 for each additional $1,000 or fraction thereof | — |
| Work done without an approved permit | Tripled original permit fee | Emergencies as defined in the adopted codes are exempt from the triple-fee penalty |
Review timeline
~5–15 business days
Typical estimate — confirm current times with the Unincorporated Natrona County building department
Inspection process
- 1
Footing / Foundation
Before concrete pour — verify footing dimensions, reinforcement, and foundation type
- 2
Framing
After framing complete, before insulation or wall cover
- 3
MEP Rough-In
Mechanical, electrical, and plumbing rough-in before walls closed; scheduled with the Building Department at 307-235-9435
- 4
Final
All work complete per approved plans and adopted codes, ready for occupancy
Tips
- Natrona County charges ALL permit types (building, electrical, plumbing, mechanical, roofing) under one combined valuation-based fee table — the 'Job Valuation' you declare on the application directly sets your fee band.
- Contact the Building Department (307-235-9435) before submitting if you are unsure whether your contractor's license is current — expired licenses or insurance will block permit approval.
- Building without an approved permit triples your fee — get the permit before work commences.
- This unincorporated-county page is distinct from the City of Casper (the county seat), which runs its own separate municipal building department; confirm you are outside Casper's city limits before using this page's permit process.
Frequently asked questions
- Does Natrona County require a building permit for new home construction outside city limits?
- Yes. Natrona County holds delegated building authority under W.S. § 35-9-121 and issues its own building permits for unincorporated county territory, reviewed under the adopted 2024 IRC. Apply via the Natrona County Building Department (307-235-9435) or online at natronacountywy.viewpointcloud.com.
- How is the building permit fee calculated in Natrona County?
- Fees are valuation-based per Resolution No. 45-20: from $70 for work valued $0–$2,500 up to $905 plus $9.24 per additional $1,000 for work valued over $98,000. All trades (building, electrical, plumbing, mechanical) share this same fee table.
Sources & verification
Verified against official sources. Last reviewed 2026-07-01.
- Natrona County Building Department — official building department
- Natrona County Building & Inspection Department
- Natrona County Permit Fees — Resolution No. 45-20 (Jan 2024–current)
- Natrona County Building Permit Application (2025, Residential/Commercial)
- Natrona County Adopted Building Codes
- Resolution Adopting 2024 International Residential Code (Resolution 90-24)
- Apply for a Building Permit Online — ViewPointCloud
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 Natrona County building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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