Cost of accessory dwelling unit

Looking for cost of accessory dwelling unit in San Antonio, TX? Call AccessoryDwellingUnit Direct 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 variables that shift your total investment. The footprint size and complexity of the architectural design are primary factors. Are you planning a detached unit that requires new utility trenching, or is this a garage conversion that uses existing plumbing? Site accessibility, soil conditions, and your choice of finishes—like luxury flooring versus standard options—also play significant roles. Permitting fees vary widely depending on your local municipality and current zoning requirements. Exact pricing confirmed free on the call.

About this service

Building an ADU involves several variables that shift your final total, such as the size of the unit, whether you choose a detached structure or a garage conversion, and the complexity of your site’s plumbing and electrical needs. We help you navigate these choices to keep your project on track. Exact pricing confirmed free on the call.

Frequently asked in San Antonio

What are the disadvantages of ADUs in San Antonio?

Potential disadvantages can include the time and complexity of the permitting process, which varies by San Antonio neighborhood. You might also face challenges with existing utility hookups or specific zoning restrictions that limit size or placement. Careful planning with a local expert can help mitigate these issues.

How much does an ADU cost in Texas?

What are the rules for ADUs in San Antonio?

San Antonio has specific zoning ordinances governing ADUs, including requirements for setbacks, lot coverage, and parking. These rules can differ slightly depending on the zoning district of your property. Understanding these regulations is crucial for a smooth building process.

Is an ADU allowed in my San Antonio neighborhood?

Generally, ADUs are permitted in most residential zones in San Antonio, but specific rules apply. Factors such as lot size and existing structures on your property will determine feasibility. A quick call can clarify the regulations for your specific address.

Can I get a quote for a detached ADU in San Antonio?

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

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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, Alamo Heights, Downtown, Northwest San Antonio, Southtown — and every surrounding area.