Cost to build accessory dwelling unit — Round Rock, TX
Last updated: September 24, 2026
What affects the price
Building an ADU involves several moving parts that shape your total budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.
About this service
When calculating the budget for a secondary unit, consider the costs for architectural design, permits, materials, and labor. Custom designs and high-end interior finishes will push your budget higher, while standardized layouts can keep costs more predictable. Exact pricing confirmed free on the call.
Frequently asked in Round Rock
How do I find an ADU builder in Round Rock?
What are the best accessory dwelling unit companies in Round Rock?
Can I find ADU services near me in Round Rock?
Are there 24-hour ADU services available in Round Rock?
What are the rental possibilities for an accessory dwelling unit in Round Rock?
Are there ADU grants or incentives in Round Rock?
What is involved in ADU construction in Round Rock?
Also serving nearby: Georgetown · Austin · Killeen · Temple · New Braunfels
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Round Rock — population 130,406; about 3,439 residents per square mile across 37.9 sq mi. ZIP codes covered include 78664, 78665, 78680, 78681, 78682, 78683.
Neighborhoods served in Round Rock: Old Town, Cathedral Park, Brushy Creek, Sendero Springs, Forest Creek — and every surrounding area.
Areas we serve
Browse by state, then city.