Williamson County

Home permits and project costs in Round Rock, TX

Round Rock sits in Williamson County, Texas. Hail and high straight-line winds are the dominant loss driver, so impact-rated roofing and insurance-funded replacement shape local pricing. Work outside city limits is permitted by the county building department rather than the city.

Verified August 2026

Local cost index

-5%

vs national average

Permit fee index

-5%

vs national baseline

Population

126,431

Homeownership

Do you need a permit in Round Rock?

For most structural work, yes

Round Rock enforces statewide irc adoption for residential construction, amended locally through Williamson 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 Round Rock

National baselines adjusted by the local labor and materials index.

Project	Typical cost	Permit	Deep pages
Roof Replacement	$9,400 – $31,600	required	Cost·Permit
AC Replacement	$5,100 – $15,200	required	Cost·Permit
Fence Installation	$2,300 – $10,700	usually required	Cost·Permit
Water Heater Replacement	$1,200 – $5,200	required	Cost·Permit
Pool Installation	$37,100 – $112,100	required	Cost·Permit
Window Replacement	$7,400 – $33,600	required	Cost·Permit
Electrical Panel Replacement	$1,800 – $6,600	required	Cost·Permit
Generator Installation	$6,300 – $21,400	required	Cost·Permit
Solar Panel Installation	$14,800 – $47,400	required	Cost·Permit
Kitchen Remodel	$17,400 – $89,100	conditional	Cost·Permit
Bathroom Remodel	$8,700 – $40,600	conditional	Cost·Permit
Driveway Replacement	$4,100 – $18,400	usually required	Cost·Permit
Paver Patio & Walkway	$3,400 – $15,400	conditional	Cost·Permit
Deck Construction	$5,300 – $27,200	required	Cost·Permit
Shed Installation	$1,700 – $11,500	conditional	Cost·Permit
Whole-House Repipe	$4,300 – $15,400	required	Cost·Permit
EV Charger Installation	$800 – $4,100	required	Cost·Permit
Hurricane Shutter Installation	$3,100 – $17,700	required	Cost·Permit
Pool Enclosure / Screen Cage	$8,800 – $41,100	required	Cost·Permit
Septic System Replacement	$7,400 – $27,400	required	Cost·Permit
Impact Window Installation	$8,900 – $41,700	required	Cost·Permit
Exterior Door Replacement	$900 – $6,400	usually required	Cost·Permit
Garage Door Replacement	$1,400 – $7,400	required	Cost·Permit
Siding Installation	$7,800 – $37,000	usually required	Cost·Permit
Stucco Repair	$900 – $15,400	conditional	Cost·Permit
Soffit & Fascia Replacement	$1,800 – $10,700	conditional	Cost·Permit
Gutter Installation	$900 – $6,200	rarely required	Cost·Permit
Roof Repair	$400 – $4,600	conditional	Cost·Permit
Flat Roof Replacement	$5,900 – $27,500	required	Cost·Permit
Attic Insulation	$1,200 – $7,300	rarely required	Cost·Permit
Ductwork Replacement	$2,400 – $11,700	required	Cost·Permit
Mini Split Installation	$2,300 – $12,200	required	Cost·Permit
Flooring Installation	$2,400 – $19,300	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 – $14,300	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 – $11,700	rarely required	Cost·Permit
Tub to Shower Conversion	$3,400 – $15,400	usually required	Cost·Permit
Sod Installation	$900 – $6,800	rarely required	Cost·Permit
Irrigation System Installation	$2,100 – $9,600	conditional	Cost·Permit
Tree Removal	$400 – $5,200	conditional	Cost·Permit
Outdoor Kitchen	$5,800 – $43,600	usually required	Cost·Permit
Seawall Repair	$7,800 – $93,000	required	Cost·Permit
Dock Construction	$8,800 – $83,200	required	Cost·Permit
Well Installation	$5,400 – $24,300	required	Cost·Permit
Mold Remediation	$1,400 – $14,300	conditional	Cost·Permit
Water Softener Installation	$1,200 – $6,300	usually required	Cost·Permit
Home Addition	$44,200 – $275,000	required	Cost·Permit

Round Rock permitting basics

Jurisdiction	Round Rock, Williamson County
Building department	Confirm with the city or county
Permit portal	No verified online portal on file
Owner-builder permits	Owner-builder permits allowed on owner-occupied property
Contractor verification	Verify any license with Texas Department of Licensing and Regulation before signing

Sources

Sources & verification

Texas Department of Licensing and Regulation

Last verified August 2026. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing — they are not quotes. Permit rules change; confirm with the building department before starting work.