Building in Williamson County
Western Williamson County, including parts of Cedar Park, Leander, Georgetown and Liberty Hill, sits on karst limestone with caves and voids, some of them home to protected cave dwelling species covered by the county's regional habitat plan. Over the Edwards Aquifer recharge zone, state rules require work to pause if excavation opens a cave or void so it can be assessed, which matters for pools and foundations.
East of I-35, Hutto and Taylor sit on deep Blackland Prairie clay, among the most expansive soils in Texas. Growth around the Samsung plant in Taylor and the fast growing suburbs has made Williamson County one of the busiest building markets in the state.
Cities we serve in Williamson County
Round Rock
Most of Round Rock was built from the 1980s onward, with large subdivisions such as Forest Creek and Teravista and a small historic core around downtown. ZIP codes: 78664, 78665, 78681.
Cedar Park
Cedar Park grew fast from the 1980s, with established neighborhoods such as Buttercup Creek and newer ones toward the west. ZIP codes: 78613.
Leander
Leander is one of the fastest growing cities in the region, and most homes are less than 20 years old. ZIP codes: 78641.
Georgetown
Georgetown ranges from Victorian era homes around the historic courthouse square to the large Sun City Texas active adult community and newer subdivisions like Wolf Ranch. ZIP codes: 78626, 78628, 78633.
Hutto
Hutto went from a small farm town to a fast growing suburb, so most homes are recent builds alongside a historic downtown. ZIP codes: 78634.
Liberty Hill
Liberty Hill has gone from a small town to a fast growing suburb, with master planned communities like Santa Rita Ranch and acreage homes around them. ZIP codes: 78642.
Taylor
Taylor has early 1900s homes around its historic downtown alongside newer subdivisions, and demand has grown with the Samsung semiconductor plant. ZIP codes: 76574.
Jarrell
Jarrell sits at the north end of Williamson County on I-35. ZIP codes: 76537.
Florence
Florence is a small town in northwest Williamson County surrounded by ranch land. ZIP codes: 76527.
Granger
Granger, in northeast Williamson County, is a small town with deep Czech heritage, a historic downtown and older homes, near Granger Lake.. ZIP codes: 76530.
Thrall
Thrall is a small town on US 79 east of Taylor that had an oil boom in 1915. ZIP codes: 76578.
Coupland
Coupland is a small railroad town in southeast Williamson County, known for the Coupland Dancehall, with older homes in town and farmhouses and acreage around it.. ZIP codes: 78615.
Services in Williamson County
- Kitchen Remodeling
- Bathroom Remodeling
- Whole Home Renovation
- Room Additions & ADUs
- Custom Home Building
- Garage Conversions
- Garage Construction
- Decks & Patio Covers
- Pool Construction & Remodeling
- Investor & Rental Renovations
Permits in Williamson County
Inside city limits, each city issues its own building permits and runs its own inspections. In unincorporated areas, Texas counties generally do not issue building permits, but Williamson County handles floodplain and on site septic permits, and HOAs and deed restrictions still apply. We check the rules for your exact address during the free consultation.
Read our Williamson County permit guide for the development, floodplain and septic rules outside city limits.