Natrona County

Home permits and project costs in Casper, WY

Casper sits in Natrona County, Wyoming. Snow load, hail and deep freeze-thaw cycling drive roofing, insulation and exterior envelope specifications well above Sun Belt minimums. Work outside city limits is permitted by the county building department rather than the city.

Model reviewed August 2026

Local cost index

-5%

vs national average

Permit fee index

-25%

vs national baseline

Population

58,722

Homeownership

Do you need a permit in Casper?

For most structural work, yes

Casper enforces local adoption of the irc; no statewide residential code through Natrona County. Roofing, electrical, plumbing, structural, pools and most exterior additions require a permit and inspection. Cosmetic work — paint, flooring, cabinet swaps — generally does not.

Project costs in Casper

National baselines adjusted by the local labor and materials index.

Project	Typical cost	Permit	Deep pages
Roof Replacement	$8,900 – $29,800	required	Cost·Permit
AC Replacement	$4,900 – $14,700	required	Cost·Permit
Fence Installation	$2,300 – $10,400	usually required	Cost·Permit
Water Heater Replacement	$1,100 – $5,100	required	Cost·Permit
Pool Installation	$35,600 – $107,600	required	Cost·Permit
Window Replacement	$7,100 – $32,000	required	Cost·Permit
Electrical Panel Replacement	$1,800 – $6,400	required	Cost·Permit
Generator Installation	$6,100 – $20,600	required	Cost·Permit
Solar Panel Installation	$14,300 – $45,800	required	Cost·Permit
Kitchen Remodel	$17,200 – $88,100	conditional	Cost·Permit
Bathroom Remodel	$8,600 – $40,200	conditional	Cost·Permit
Driveway Replacement	$4,000 – $18,000	usually required	Cost·Permit
Paver Patio & Walkway	$3,300 – $15,200	conditional	Cost·Permit
Deck Construction	$5,200 – $26,300	required	Cost·Permit
Shed Installation	$1,700 – $11,400	conditional	Cost·Permit
Whole-House Repipe	$4,200 – $15,000	required	Cost·Permit
EV Charger Installation	$800 – $3,900	required	Cost·Permit
Hurricane Shutter Installation	$3,000 – $16,800	required	Cost·Permit
Pool Enclosure / Screen Cage	$8,400 – $39,200	required	Cost·Permit
Septic System Replacement	$7,000 – $26,200	required	Cost·Permit
Impact Window Installation	$8,400 – $39,400	required	Cost·Permit
Exterior Door Replacement	$800 – $6,100	usually required	Cost·Permit
Garage Door Replacement	$1,300 – $7,000	required	Cost·Permit
Siding Installation	$7,500 – $35,800	usually required	Cost·Permit
Stucco Repair	$900 – $15,200	conditional	Cost·Permit
Soffit & Fascia Replacement	$1,700 – $10,400	conditional	Cost·Permit
Gutter Installation	$900 – $6,200	rarely required	Cost·Permit
Roof Repair	$400 – $4,500	conditional	Cost·Permit
Flat Roof Replacement	$5,600 – $26,100	required	Cost·Permit
Attic Insulation	$1,200 – $7,300	rarely required	Cost·Permit
Ductwork Replacement	$2,400 – $11,400	required	Cost·Permit
Mini Split Installation	$2,300 – $11,900	required	Cost·Permit
Flooring Installation	$2,400 – $19,200	rarely required	Cost·Permit
Tile Installation	$1,700 – $15,300	rarely required	Cost·Permit
Interior Painting	$1,400 – $9,000	rarely required	Cost·Permit
Exterior Painting	$2,700 – $14,200	rarely required	Cost·Permit
Drywall Repair	$300 – $4,300	rarely required	Cost·Permit
Kitchen Cabinet Refacing	$4,300 – $19,100	rarely required	Cost·Permit
Countertop Replacement	$2,100 – $11,600	rarely required	Cost·Permit
Tub to Shower Conversion	$3,300 – $15,100	usually required	Cost·Permit
Sod Installation	$900 – $6,700	rarely required	Cost·Permit
Irrigation System Installation	$2,100 – $9,500	conditional	Cost·Permit
Tree Removal	$400 – $5,200	conditional	Cost·Permit
Outdoor Kitchen	$5,700 – $42,500	usually required	Cost·Permit
Seawall Repair	$7,400 – $88,400	required	Cost·Permit
Dock Construction	$8,400 – $79,100	required	Cost·Permit
Well Installation	$5,100 – $23,400	required	Cost·Permit
Mold Remediation	$1,400 – $14,100	conditional	Cost·Permit
Water Softener Installation	$1,100 – $6,100	usually required	Cost·Permit
Home Addition	$41,900 – $261,000	required	Cost·Permit
Heat Pump Replacement	$6,200 – $20,900	required	Cost·Permit
Furnace Replacement	$3,000 – $10,900	required	Cost·Permit
Foundation Repair	$2,700 – $30,300	usually required	Cost·Permit
Basement Waterproofing	$2,900 – $17,200	conditional	Cost·Permit
Drain Field Replacement	$5,600 – $23,500	required	Cost·Permit
Toilet Installation	$200 – $1,000	rarely required	Cost·Permit
Hot Tub Installation	$5,200 – $20,800	usually required	Cost·Permit

Casper permitting basics

Jurisdiction	Casper, Natrona County
Building department	Confirm with the city or county
Permit portal	No verified online portal on file
Owner-builder permits	Owner-builder permits common
Contractor verification	Verify any license with Wyoming Department of Fire Prevention and Electrical Safety before signing

Sources

Sources & verification

Wyoming Department of Fire Prevention and Electrical Safety

Model vintage August 2026. The links above are the issuing agencies' own pages — we publish them so you can confirm the current rule yourself, not as evidence that each fact on this page was re-checked with them today. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing, not quotes. Permit rules change; confirm with the building department before starting work.