This is PermitBase’s published record for Unincorporated Natrona County as of 2026-07-01. It has since been superseded — see the current record. A historical record reflects what PermitBase had verified at that time; it may not capture a real-world change the jurisdiction had made but PermitBase had not yet verified, and it includes any errors we later corrected. Snapshots are never edited retroactively.
Unincorporated Natrona County building permits
VerifiedUnincorporated Natrona County, Wyoming — as published 2026-07-01.
Verified 2026-07-01 · Source
Codes adopted
2024 International Building Code (IBC) — adopted by Resolution 84-242024 International Residential Code (IRC) — adopted by Resolution 90-242024 International Existing Building Code (IEBC) — adopted by Resolution 85-242024 International Fire Code (IFC) — adopted by Resolution 86-242024 International Fuel Gas Code (IFGC) — adopted by Resolution 87-242024 International Mechanical Code (IMC) — adopted by Resolution 88-242024 International Plumbing Code (IPC) — adopted by Resolution 89-242023 National Electrical Code (NEC / NFPA 70) — adopted by county resolution
Permit types & fees
Residential Building Permit (New Construction)
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
Requirements
- 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
- RequiredNatrona 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
- RequiredSite 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
- OptionalAddress 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 |
Residential Addition / Remodel Permit
VerifiedRequired for additions, remodels, basement finishes, and repairs to existing one- and two-family dwellings in unincorporated Natrona County. Uses the same combined Building Permit Application as new construction (select 'Remodel,' 'Addition,' or 'Repair' as Type of Work).
Verified 2026-07-01 · Source
Requirements
- Same Building Permit Application form as new construction; select Type of Work: Remodel, Addition, or Repair
- Declare whether work has already commenced (application asks 'Has work commenced on this project? Yes/No')
- Existing and proposed bedroom/bathroom counts must be listed for additions/remodels affecting habitable space
- Job valuation must be declared — fee is set by the same valuation-based table used for new construction
- Licensed, currently-insured Natrona County contractor required unless the property owner is performing the work themselves
Required documents
- RequiredNatrona County Building Permit Application (Residential or Commercial, 2025 form)Same combined application form used for all building permit work types
- RequiredSite Plan Application (2025)Required for additions that change the building footprint or setbacks
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee — valuation-based (same table as new construction) | $70 (valuation $0–$2,500) up to $905 plus $9.24 per additional $1,000 over $98,000 | Natrona County Permit Fees, Resolution No. 45-20 — remodels/additions/repairs use the identical valuation-based schedule as new construction; no separate remodel fee line exists. |
| Compliance Inspection (if construction started without a permit) | $150 residential / $300 commercial | Resolution No. 45-20; also see Compliance Inspection Application form |
Electrical Permit
VerifiedRequired for electrical installations, service changes, and repairs in unincorporated Natrona County. Natrona County holds LOCAL delegated electrical enforcement authority (BLDG L/L, ELEC L/L per the WY State Fire Marshal jurisdictions chart) — the county's OWN Building Department issues and inspects electrical permits under the adopted 2023 NEC; this is NOT the WY State Fire Marshal's default statewide electrical program.
Verified 2026-07-01 · Source
Requirements
- Electrical Permit Application submitted to the Natrona County Building Department (in person, mail, or online via ViewPointCloud)
- Specify nature of building (Residential/Commercial) and nature of project (New Construction, Basement Finish, Addition, Remodel, Repair, Service New/Repair/Replacement, Backup Generator, Solar/PV Installation)
- Service Type (New/Existing/Temporary) with Amps and Volts must be specified
- Job valuation must be declared — fee follows the same county valuation-based fee table used for all trades
- Work must be performed by, or under, a Natrona County-licensed Electrical Contractor, Master, Journeyman, or Apprentice electrician (license classes verified via the county's Electrical Contractor License Fee Schedule)
- Governed by the 2023 National Electrical Code (NEC/NFPA 70) as adopted by county resolution
Required documents
- RequiredNatrona County Electrical Permit Application (2025)Application form for all electrical work — new construction, service changes, generators, solar/PV interconnection
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Electrical Permit Fee — valuation-based (same table as building permits) | $70 (valuation $0–$2,500) up to $905 plus $9.24 per additional $1,000 over $98,000 | Natrona County Permit Fees, Resolution No. 45-20 — electrical permits are NOT charged a separate flat fee; they use the same combined valuation-based schedule as building/plumbing/mechanical permits, based on declared job valuation. |
| Electrical Contractor License — Initial | $300 (Contractor); $75 (Master); $25 (Journeyman); $3 (Apprentice) | Natrona County Contractor Fees (Revised 02/21) — required license held by the electrician performing the work, separate from the permit fee itself |
| Electrical Contractor License — Annual Renewal | $75 (Contractor); $37.50 (Master); $15 (Journeyman); $3 (Apprentice) | Due by December 31 each year; renewal after February 1 requires paying the initial fee again |
Plumbing Permit
VerifiedRequired for plumbing installations, gas line work, and septic-connected plumbing in unincorporated Natrona County. Governed by the 2024 International Plumbing Code (IPC) as adopted by Resolution 89-24, and the 2024 International Fuel Gas Code for gas piping.
Verified 2026-07-01 · Source
Requirements
- Plumbing Permit Application submitted to the Natrona County Building Department
- Specify whether the work is a gas-line-only install/repair
- Water source (Public/Well) and sewer type (Public/Septic) with providers must be identified; septic system status (new install vs. existing) must be disclosed
- Nature of Project options: New Construction, Basement Finish, Addition, Remodel, Repair
- Commercial kitchen disclosure required if applicable; yard hydrant installations must be disclosed with hydrant type
- Fuel type must be specified (Natural Gas, Liquid Propane Gas, Other) for gas piping work
- Work must be performed by a Natrona County-licensed Plumbing Contractor, Master, Journeyman, or Apprentice (or Gas Fitter/Boiler Operator as applicable)
Required documents
- RequiredNatrona County Plumbing Permit Application (2025)Covers new plumbing, gas line work, water/sewer connections, and septic-related plumbing
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Plumbing Permit Fee — valuation-based (same table as building permits) | $70 (valuation $0–$2,500) up to $905 plus $9.24 per additional $1,000 over $98,000 | Natrona County Permit Fees, Resolution No. 45-20 — plumbing has no separate flat fee; charged under the same combined valuation-based schedule as building/electrical/mechanical. |
| Plumbing Contractor License — Initial | $300 (Contractor); $75 (Master); $25 (Journeyman); $3 (Apprentice); $20 (High Pressure Boiler Operator); $10 (Low Pressure Boiler Operator / Gas Fitter) | Natrona County Contractor Fees (Revised 02/21) |
| Plumbing Contractor License — Annual Renewal | $75 (Contractor); $37.50 (Master); $15 (Journeyman); $3 (Apprentice); $10 (High Pressure Boiler Operator); $5 (Low Pressure Boiler Operator / Gas Fitter) | — |
Mechanical / HVAC Permit
VerifiedRequired for heating, cooling, and fuel-gas appliance installations in unincorporated Natrona County. Governed by the 2024 International Mechanical Code (IMC, Resolution 88-24) and 2024 International Fuel Gas Code (IFGC, Resolution 87-24).
Verified 2026-07-01 · Source
Requirements
- Mechanical Permit Application submitted to the Natrona County Building Department
- Specify Applicant Type (Owner/Contractor) and fuel type (Natural Gas, Liquid Propane Gas, Other)
- Disclose whether work is being done on Casper/Natrona County Airport property (special jurisdiction flag on the form)
- Nature of Project: New Construction, Basement Finish, New Installation, or Replacement
- Quantity and type of appliance must be listed: A/C (tonnage), mini-split (tonnage), boiler (BTU), refrigeration units (tonnage), furnace (BTU), pellet stove, wood stove, gas fireplace (BTU), unit heaters (BTU), infrared/tube heat (BTU), commercial air handler (CFM), wall heater (BTU), residential/commercial clothes dryers, evaporative cooler
- Job valuation must be declared for fee calculation
Required documents
- RequiredNatrona County Mechanical Permit Application (2025)Covers HVAC equipment installation/replacement and fuel-gas appliances
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Mechanical Permit Fee — valuation-based (same table as building permits) | $70 (valuation $0–$2,500) up to $905 plus $9.24 per additional $1,000 over $98,000 | Natrona County Permit Fees, Resolution No. 45-20 — mechanical/HVAC has no separate flat fee; uses the same combined valuation-based schedule. |
| Mechanical Contractor License — Initial | $300 (Contractor); $75 (Master); $25 (Journeyman); $3 (Apprentice) | Natrona County Contractor Fees (Revised 02/21) |
| Mechanical Contractor License — Annual Renewal | $75 (Contractor); $37.50 (Master); $15 (Journeyman); $3 (Apprentice) | — |
Roofing Permit (Reroof)
VerifiedRequired for roof replacement (tear-off and reroof) on residential and commercial buildings in unincorporated Natrona County. The Building Department does not perform underlayment/decking inspections — the owner/contractor must photo-document decking and underlayment before requesting final inspection.
Verified 2026-07-01 · Source
Requirements
- Roofing Permit Application submitted to the Natrona County Building Department
- Specify roof material (Metal, Asphalt, Membrane, Other), number of squares, and use of building (Commercial/Residential)
- Disclose whether existing roofing material is being removed and whether the new roof is going over the existing roof (recover vs. tear-off)
- Owner/contractor must provide photos of decking and underlayment BEFORE requesting final inspection — the county does not send an inspector for this step
- Job valuation must be declared for fee calculation
- Work must be performed by a Natrona County-licensed Roof contractor (license class 'Roof' under Miscellaneous licensing)
Required documents
- RequiredNatrona County Roofing Permit Application (2025)Covers tear-off and recover reroofing for residential and commercial buildings
- RequiredDecking/Underlayment PhotosOwner/contractor-supplied photo documentation of the decking and underlayment condition, required before the final inspection can be requested (the county does not inspect this step directly)
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Roofing Permit Fee — valuation-based (same table as building permits) | $70 (valuation $0–$2,500) up to $905 plus $9.24 per additional $1,000 over $98,000 | Natrona County Permit Fees, Resolution No. 45-20 — roofing has no separate flat fee; uses the same combined valuation-based schedule. |
| Roof Contractor License — Initial | $150 | Natrona County Contractor Fees (Revised 02/21), 'Miscellaneous' license category |
| Roof Contractor License — Annual Renewal | $75 | — |
Solar PV Permit
VerifiedRequired for rooftop or ground-mounted residential/accessory solar photovoltaic (PV) installations in unincorporated Natrona County. Classified in the Natrona Next Zoning Resolution as a 'Solar Generator, Accessory' (Section 4.10.13) — a use PERMITTED (P) by-right in every zoning district in the county. The electrical interconnection portion is processed on the county's standard Electrical Permit Application ('Solar/PV Installation' is a listed Nature of Project option).
Verified 2026-07-01 · Source
Requirements
- Zoning: Accessory solar generators are a permitted (by-right) accessory use in ALL zoning districts per Natrona Next Zoning Resolution § 4.10.13 — no special use / conditional use permit needed for a single-property system serving up to that property
- Ground-mounted systems: must meet the applicable zoning district's minimum accessory-structure setback (or principal-structure setback if no accessory setback is specified)
- Ground-mounted systems: maximum height 25 feet
- Ground-mounted systems within 300 ft of an abutting ground-floor residential use require a Type A landscape buffer (per Zoning Resolution § 3.03 Buffering and Screening)
- All ground-mounted panels/equipment (except utility connection fencing/poles/wires) must be enclosed by a fence at least 6 ft high, with clearly visible voltage-hazard warning signs and wildlife-fencing style options
- Community/shared ground-mounted generators serving up to 10 property owners require a Special Use Permit from Natrona County Planning
- Electrical interconnection requires a county Electrical Permit — select 'Solar/PV Installation' as the Nature of Project
- Decommissioning: any accessory solar generator no longer producing energy or abandoned must be physically removed (all panels, structures, equipment) within 150 days of discontinued operation
Required documents
- RequiredNatrona County Electrical Permit Application (2025)Used for the electrical/interconnection portion of the solar installation — select 'Solar/PV Installation'
- OptionalSite Plan Application (2025)Required for ground-mounted systems to confirm setback and buffer compliance with Zoning Resolution § 4.10.13
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Electrical Permit Fee — valuation-based (same table as building permits) | $70 (valuation $0–$2,500) up to $905 plus $9.24 per additional $1,000 over $98,000 | Natrona County Permit Fees, Resolution No. 45-20 — solar interconnection is processed as an electrical permit under the same combined valuation-based schedule; no dedicated solar fee line exists. |
Accessory Dwelling Unit (ADU) Permit
VerifiedRequired for construction of an ADU on a residential property in unincorporated Natrona County. ADUs are expressly defined and regulated as a Permitted (P) accessory use in the Urban Agricultural (UA), Mountain Residential 1 & 2 (MR-1/MR-2), Suburban Residential (SR), Rural Residential (RR), and Urban Residential (UR) zoning districts under the Natrona Next Zoning Resolution § 4.11.05(A). Built under the standard county Building Permit process once zoning standards are confirmed with Planning.
Verified 2026-07-01 · Source
Requirements
- Zoning eligibility: ADU must be an accessory use to a legally permitted single-unit residential use in a district where ADUs are listed as Permitted (Table 4.02, districts include UA, MR-1, MR-2, SR, RR, UR) — confirm with Natrona County Planning Department before applying for the building permit
- Number: One (1) ADU permitted per lot as accessory to a legally permitted single-unit residential use; in the UR district, the lot must be a minimum of 2 acres
- Density in agricultural/mountain districts is expressed per-acre: e.g. UA and MR-1 allow 1 ADU per 10 acres (1 exempt ADU for agricultural-tax-status properties per 10 acres); MR-2 allows 1 ADU per 5 acres; SR and RR allow 1 ADU per lot
- Setbacks: a detached ADU must comply with the zoning district's required (principal or accessory, as applicable) setbacks; an attached ADU must comply with principal building setbacks for its district
- Height: an ADU must NOT exceed the height of the primary dwelling
- Size: an ADU must not exceed 50% of the primary dwelling's square footage OR 1,000 gross square feet of habitable floor area, whichever is SMALLER
- Occupancy: the property owner (title holder or contract purchaser) must occupy the principal dwelling as their permanent residence — owner-occupancy of the primary unit is mandatory
- Use restriction: ADUs may not be sold separately from the primary residence, and must maintain architectural consistency with the primary dwelling
- Once zoning compliance is confirmed, the ADU is built under the standard Natrona County Building Permit Application (select New Construction or Addition, per whether attached or detached) — plus separate Electrical, Plumbing, and Mechanical permits as applicable
Required documents
- RequiredNatrona County Building Permit Application (2025)Standard application; ADUs are built under this same form once zoning is confirmed — select 'New Construction' for a detached ADU or 'Addition' for an attached one
- RequiredSite Plan Application (2025)Required to confirm setback compliance and ADU placement on the lot relative to the primary dwelling
- OptionalNatrona Next Zoning Resolution — § 4.11.05(A)Governing ADU standard (definition, number, setbacks, height, size, occupancy, use restrictions); consult Natrona County Planning Department to confirm district-specific eligibility before applying
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee — valuation-based (same table as new construction) | $70 (valuation $0–$2,500) up to $905 plus $9.24 per additional $1,000 over $98,000 | Natrona County Permit Fees, Resolution No. 45-20 — an ADU is charged under the same combined valuation-based building-permit fee schedule as any other new residential construction; no separate ADU fee line exists. |
Demolition Permit
VerifiedRequired for demolition of structures in unincorporated Natrona County. Uses the standard Building Permit Application process; charged a dedicated flat demolition fee (distinct from the general valuation table) per the county's adopted fee resolution.
Verified 2026-07-01 · Source
Requirements
- Submit a Building Permit Application to the Natrona County Building Department describing the demolition scope
- Disclose property owner, contractor (must hold a current Natrona County Demolition contractor license), and site address/parcel information
- Coordinate utility disconnects and any required Wyoming DEQ asbestos abatement documentation prior to demolition (DEQ asbestos program linked from the county's Adopted Building Codes quick-links)
- Demolition contractor must hold a current Natrona County Demolition license
Required documents
- RequiredNatrona County Building Permit Application (2025)Used for demolition permit applications — describe scope of work as demolition
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Demolition Permit — Residential | $75 | Natrona County Permit Fees, Resolution No. 45-20 — flat fee, separate from the general valuation table |
| Demolition Permit — Commercial | $150 | Natrona County Permit Fees, Resolution No. 45-20 — flat fee |
| Demolition Contractor License — Initial | $150 | Natrona County Contractor Fees (Revised 02/21) |
| Demolition Contractor License — Annual Renewal | $75 | — |
Commercial Tenant Improvement Permit
VerifiedRequired for interior alterations, remodels, or repairs to existing commercial/industrial buildings in unincorporated Natrona County. Uses the same combined Building Permit Application (select Building Use: Commercial; Type of Work: Remodel or Repair), reviewed under the 2024 IBC and IEBC as adopted.
Verified 2026-07-01 · Source
Requirements
- Same Natrona County Building Permit Application as residential work; select Building Use = Commercial and the applicable Type of Work (Remodel, Addition, Repair)
- Building Type on the application should reflect Commercial/Industrial
- Job valuation of the tenant improvement work must be declared for fee calculation
- Reviewed under the 2024 International Building Code (IBC, Resolution 84-24) and 2024 International Existing Building Code (IEBC, Resolution 85-24) for alterations to existing structures
- Separate Electrical, Plumbing, and Mechanical permits required for any trade work within the tenant space
- Contractor must hold the applicable current Natrona County contractor license (General Contractor Class I/II/III depending on project scope) with active insurance
Required documents
- RequiredNatrona County Building Permit Application (2025)Same combined form; mark Building Use = Commercial
- OptionalSite Plan Application (2025)May be required if the tenant improvement affects parking, access, or the building footprint
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee — valuation-based (same table as all building permits) | $70 (valuation $0–$2,500) up to $905 plus $9.24 per additional $1,000 over $98,000 | Natrona County Permit Fees, Resolution No. 45-20 — commercial tenant improvements use the identical valuation-based schedule as residential work; no separate commercial fee table exists. |
| Compliance Inspection — Commercial | $300 | Applies if work commenced before permit approval |
Deck Permit
VerifiedRequired for construction of a new deck attached to a residential dwelling in unincorporated Natrona County. Processed under the standard Building Permit Application (Type of Work: Addition) and reviewed under the 2024 IRC; must comply with the accessory/principal structure setbacks of the applicable zoning district.
Verified 2026-07-01 · Source
Requirements
- Natrona County Building Permit Application submitted; select Type of Work: Addition
- Deck must comply with the applicable zoning district's building setbacks — for districts with a distinct accessory-structure setback (e.g. Suburban Residential: 5 ft side/front, 8 ft rear; Rural Residential: 5 ft side/front, 8 ft rear), attached decks generally follow principal-structure setbacks unless the district specifies otherwise
- Job valuation of deck construction must be declared for fee calculation
- Structural details (footings, ledger attachment, joist/beam sizing) reviewed under the 2024 IRC deck provisions
- Contractor must hold a current Natrona County General Contractor license if not owner-built
Required documents
- RequiredNatrona County Building Permit Application (2025)Standard form; select Addition as Type of Work for a deck
- RequiredSite Plan Application (2025)Shows deck location relative to property lines and setbacks
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee — valuation-based (same table as all building permits) | $70 (valuation $0–$2,500) up to $905 plus $9.24 per additional $1,000 over $98,000 | Natrona County Permit Fees, Resolution No. 45-20 — decks have no dedicated flat fee; charged under the general valuation-based building-permit fee schedule based on declared construction cost. |
Sources & verification
Verified against official sources. Last reviewed 2026-07-01.
Fee schedules
Applications & forms
Codes & ordinances
Department & other records
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.