Cost of accessory dwelling unit

Looking for cost of accessory dwelling unit in San Antonio, TX? Call AccessoryDwellingUnit Solutions 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

Planning an Accessory Dwelling Unit in San Antonio can add valuable space and rental income. We understand the unique zoning and building requirements specific to your San Antonio neighborhood. Our process focuses on getting you connected with the right local professionals who know the ins and outs of building in this diverse city. Whether you're considering a backyard cottage or a garage conversion, understanding the potential costs and regulations is key. We simplify that first step for you. This means no guesswork about what's possible on your property. Our goal is to make the initial consultation smooth and informative. Ready to explore your ADU options? It all starts with a simple conversation.

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

The total price for an ADU depends on several moving parts, including the square footage, your foundation type, and local labor rates. Choosing high-end finishes or complex site prep will naturally increase the budget, while standard layouts help keep things manageable. Exact pricing confirmed free on the call.

Frequently asked in San Antonio

What are the disadvantages of ADUs in San Antonio?

How much does an ADU cost in San Antonio?

What are the rules for ADUs in San Antonio?

San Antonio has specific ordinances regarding setbacks, lot coverage, and utility connections for ADUs. These rules ensure ADUs integrate well with existing neighborhoods. Understanding these regulations is crucial before you begin. We can help you get that initial clarity.

Is an ADU allowed in my San Antonio neighborhood?

Generally, ADUs are permitted in most residential zones across San Antonio, with specific guidelines to follow. The allowance often depends on your lot size and existing structures. We can help you find out about your specific area. A quick call provides the next step.

What is the process for building an ADU in San Antonio?

Can I add a second story ADU in San Antonio?

Adding a second-story ADU in San Antonio is possible, but it depends on zoning regulations, structural integrity, and lot size. Specific height restrictions and neighborhood covenants may apply. A professional assessment is necessary. We can help you find that specialist.

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: Alamo Heights, Terrell Hills, Olmos Park, King William Historic District, Southtown, The Pearl — and every surrounding area.