Looking for accessory dwelling unit services in San Antonio, TX? Call AccessoryDwellingUnit Services for a contact a provider — no obligation. Licensed adu builders serve San Antonio and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU involves several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.

About this service

These services cover the end-to-end process of adding a secondary home to your property. This includes initial zoning checks, architectural design, permit filing, and final construction. You need these services when you want to create a separate living space for family, guests, or as a rental unit, but don’t want to manage the complex legal and structural requirements on your own.

Frequently asked in San Antonio

What are the disadvantages of ADUs?

How much does an ADU cost in Texas?

What are the rules for ADUs in Texas?

Texas cities often have their own specific zoning ordinances for ADUs. These rules can cover things like minimum lot size, setbacks, and owner-occupancy requirements. It’s crucial to work with professionals familiar with San Antonio’s local regulations. They can ensure your project complies fully.

Is ADU allowed in my neighborhood?

Most cities in Texas allow ADUs, but specific neighborhood rules can apply. Some areas might have more restrictive zoning, especially historic districts. The best way to know for sure is to ask. A quick call can get you advice tailored to your San Antonio address.

What are the rules for ADU in California?

California has state-level laws encouraging ADUs, but local jurisdictions still set specific requirements. These can include setback rules, lot coverage limits, and parking requirements. Understanding these nuances is key. If you're considering an ADU in a California city, getting local advice is essential.

California has offered various grant programs to help homeowners build ADUs, sometimes covering a significant portion of the cost. These programs often have income and eligibility requirements. Details can change, so it's important to check current availability. A local ADU service can guide you on potential funding options.

Also serving nearby: New Braunfels · Austin · Round Rock · Georgetown · Killeen

All cities in Texas →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

1,495,295residents

2,997per sq mile

8ZIP codes served

Serving all of San Antonio — population 1,495,295; about 2,997 residents per square mile across 498.9 sq mi. ZIP codes covered include 78201, 78202, 78203, 78204, 78205, 78206, 78207, 78208.

Neighborhoods served in San Antonio: King William Historic District, Monte Vista, The Pearl, Downtown, Alamo Heights, Olmos Park — and every surrounding area.