Administrative overview · FIPS 56025
Natrona County permit authority
The first compliance decision is jurisdictional: identify the office with statutory authority over your parcel, then use its filing and inspection sequence to keep the project moving.
Jurisdictional status
County
This county profile is the primary starting point for unincorporated-area permitting.
Responsible agency
Natrona County Building & Inspection Department
For a project in or near Natrona County, this office is the identified point of contact for permit intake, statutory code enforcement, plan review coordination, and inspection release conditions. Confirm the parcel’s boundary and project type before relying on the county lane.
Direct contact
307-235-9435
Call before mobilizing if the project has a boundary, occupancy, fire, septic, or utility question.
Permit counter
Natrona County Building Department, 200 North Center Street, Room 205, Casper, WY 82601
Operating hours
Monday-Friday, 8:00 AM-5:00 PM Mountain
Review expectation
N/A; the County states that holidays and high-volume periods affect review time but does not publish a dependable building-permit turnaround target.
Compliance workbench
Choose the next project decision.
Apply online
Open the verified digital gateway, application form, and review timeline.
Open guide →Fees & penalties
Understand fee schedules, enforcement exposure, and stop-work liabilities.
Open guide →Codes & exemptions
Read the code framework, minor-work exemptions, and inspection lane.
Open guide →Agency website
Visit the primary public source for current notices and contact changes.
Open guide →Source trail
Official sources for this profile
Use these direct agency or licensing links to confirm current instructions before you file, pay, or schedule work. External pages control if their information differs from this directory.
Project questions
Frequently asked questions for Natrona County
Who handles permitting for this jurisdiction?
Natrona County Building & Inspection Department is the identified county-level authority for this profile. Confirm that the property is in its service area before filing.
How should I begin an application?
Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact 307-235-9435.
How long might review take?
N/A; the County states that holidays and high-volume periods affect review time but does not publish a dependable building-permit turnaround target.
How are inspections scheduled?
After permit issuance, call the Building Department at 307-235-9435 at least 24 hours before the desired inspection and obtain every inspection required for the project. Inspections are usually available the next business day, excluding weekends and holidays, but may take up to 48 hours during busy periods. Only a morning or afternoon arrival window may be available. Roofing applicants must photograph decking and underlayment because the County does not inspect those stages before final inspection.
Which codes and exemptions should I review?
2024 International Building Code, 2024 International Existing Building Code, 2024 International Fire Code, 2024 International Fuel Gas Code, 2024 International Mechanical Code, 2024 International Plumbing Code and 2024 International Residential Code, with Natrona County resolutions and amendments; 2023 National Electrical Code. Ordinary cosmetic finish work such as painting, papering, tiling, carpeting, cabinets and countertops is exempt when it does not alter structural members or regulated plumbing, electrical, mechanical or life-safety systems. Fences up to seven feet high do not require a building permit but must comply with zoning. Emergency equipment replacement or repair may proceed, with the application due the next business day. The County advises applicants to verify sheds because every shed needs a zoning certificate; current County materials do not establish a reliable building-permit size exemption for sheds.