City Building Permits

Casper, WY - 2026 Building Permit Guide

How to apply for a building permit in Casper, Wyoming. Permit authority, application steps, fees, and inspection requirements.

Wyoming Natrona County Updated March 2026

Permit Authority

All properties within the incorporated city limits of Casper. Property located in unincorporated areas adjacent to Casper falls under Natrona County jurisdiction, not City of Casper.

Department
Building Inspection Division, Community Development Department
Address
200 North David Street, Casper, WY 82601
Phone
(307) 235-8254
Website
https://www.casperwy.gov/services/building_and_inspections/index.php

Online Permit Portal

Open Citizen Self-Service (CSS) Portal

Platform: EnerGov • Account required: Yes • Submission: Online only

Application Process

  1. Contact Planning/Zoning at (307) 235-8241 before submitting plans to confirm the project complies with City of Casper zoning regulations.
  2. Register for an account on the CSS Portal.
  3. Prepare required documents based on project type (residential interior remodel, residential exterior addition/garage, commercial, or specialized projects).
  4. Submit permit application and all supporting documents through the CSS Portal or in person.
  5. Staff reviews submission for code compliance.
  6. Upon approval, permit is issued. The permit must be posted on-site before work begins.
  7. Schedule required inspections through the CSS Portal or by phone during construction.
  8. Pass all required inspections. Certificate of Occupancy issued after all final inspections are passed.

Typical processing time: Contact (307) 235-8254 for processing time estimates.

Source: Building Inspection Division, Community Development Department

General Requirements

Permits must be obtained before construction of a new building or addition, or the remodel, alteration, or repair of any existing structure within the City of Casper.

Required Documents

  • Residential interior remodel: Basic plan with fundamental information
  • Residential exterior addition or garage: Plot plan plus plans showing foundation design, room sizes, windows, and related details; soils report/engineered foundation plan for new construction; wall bracing plan
  • Commercial: Life-safety plans, engineered building and site plans, Planning/Zoning approval documentation
  • Specialized checklists available for residential and commercial projects
Permit validity
Permits remain valid for 180 days from issuance.
Building code
2024 International Building Code, 2024 International Residential Code, 2024 International Fire Code, 2024 International Existing Building Code, 2024 International Energy Conservation Code (building thermal envelope only), 2024 International Plumbing Code, 2024 International Fuel Gas Code, 2024 International Mechanical Code, 2023 NFPA 70 National Electrical Code, ICCA117.1-2009 Accessible and Usable Buildings and Facilities Code (with local amendments).
Owner-builder
Homeowners may obtain permits and work on their primary residence.
Contractor requirements
Contractors must hold a current City of Casper contractor license. Categories include General/Sub Contractors, Electrical Contractors, Plumbing/Mechanical/Individual Contractors, and Reciprocal Contractors. License renewal grace period ends March 31 of each year. Current Certificates of Insurance required for renewal.

Fees

Permit fee formula
Valuation-based for building permits (materials and labor value of the proposed work). Electrical, plumbing, and mechanical permit fees are based on the size and number of items being installed.
Payment note
Payment is accepted through the CSS Portal or in person.

Fees change. Verify current amounts at the official fee schedule.

Work That Does NOT Require a Permit

  • Single-story unheated detached storage structures under 120 square feet (a free Fence/Shed permit is still required)
  • Fences not exceeding 6 feet in height (a free Fence/Shed permit is still required)
  • Retaining walls under 4 feet high (specific conditions apply)
  • Flatwork (walkways, driveways) not exceeding 30 inches above grade
  • Interior finishing work (painting, flooring, trim)

Important: Even for exempt structures, the free Fence/Shed permit must be obtained.

Inspections

How to Schedule

Inspection hours
Monday-Friday, 8:00 AM to 5:00 PM

Typical inspection sequence: Foundation/footing, framing rough-in, insulation, drywall (if required), mechanical/electrical/plumbing rough-in, final inspection. Commercial projects require additional life-safety inspections.

Additional Resources

Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the Building Inspection Division, Community Development Department before applying.

Frequently Asked Questions

Casper Building Permit FAQ

Do I need a building permit in Casper, WY?
Permits must be obtained before construction of a new building or addition, or the remodel, alteration, or repair of any existing structure within the City of Casper.
How much does a building permit cost in Casper, WY?
Fees are calculated as: Valuation-based for building permits (materials and labor value of the proposed work). Electrical, plumbing, and mechanical permit fees are based on the size and number of items being installed..
How do I apply for a building permit in Casper, WY?
1. Contact Planning/Zoning at (307) 235-8241 before submitting plans to confirm the project complies with City of Casper zoning regulations. 2. Register for an account on the CSS Portal. 3. Prepare required documents based on project type (residential interior remodel, residential exterior addition/garage, commercial, or specialized projects). 4. Submit permit application and all supporting documents through the CSS Portal or in person. 5. Staff reviews submission for code compliance. 6. Upon approval, permit is issued. The permit must be posted on-site before work begins. 7. Schedule required inspections through the CSS Portal or by phone during construction. 8. Pass all required inspections. Certificate of Occupancy issued after all final inspections are passed.
How long does it take to get a building permit in Casper, WY?
Typical processing time is Contact (307) 235-8254 for processing time estimates..
What work is exempt from building permits in Casper, WY?
The following work is generally exempt: Single-story unheated detached storage structures under 120 square feet (a free Fence/Shed permit is still required); Fences not exceeding 6 feet in height (a free Fence/Shed permit is still required); Retaining walls under 4 feet high (specific conditions apply); Flatwork (walkways, driveways) not exceeding 30 inches above grade; Interior finishing work (painting, flooring, trim). Note: Even for exempt structures, the free Fence/Shed permit must be obtained.
How do I schedule a building inspection in Casper, WY?
Inspections can be scheduled via: CSS Portal, (307) 235-8254.

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Important: This page is an educational resource provided by jaspector.com. It is not legal advice, and it does not substitute for official guidance from the permit authority listed above. Permit requirements, fees, and processes change frequently. Always verify current requirements directly with the issuing department before beginning any construction project. Use of this page does not create an attorney-client relationship. Jaspector assumes no liability for any outcomes arising from reliance on this information.

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