# Backyard Casita Builder San Antonio | SA Remodel Pros > San Antonio ADU and backyard casita builder — detached guest houses and in-law suites with zoning guidance, utility tie-ins, and rental-income potential. URL: https://saremodelpros.com/adus-guest-casitas/ ![ADUs & Guest Casitas San Antonio](/images/misc/backyard-casita-adu-san-antonio-detached-guest-hou.webp) ADUs & Casitas # ADUs & Backyard Guest Casitas in San Antonio Detached casitas and in-law suites for multi-generational living or rental income. Get Your Free Estimate [/contact/ →](/contact/) Call (210) 366-2380 [tel:+12103662380 →](tel:+12103662380) Best of Houzz 2015–2026 8× winner GSABA Summit Award Greater San Antonio Builders BBB Accredited A+ rating since 2006 Pentalquartz Authorized Premium surfaces Schluter-Kerdi Systems Certified waterproofing Common ADUs & Casitas problems ## What San Antonio homeowners tell us before they call ### Zoning rules you can't decode on your own San Antonio's Unified Development Code sets strict setbacks, lot-coverage limits, and owner-occupancy rules that vary by district. We check eligibility before you spend money on design. ### A guest suite that feels like a hallway bedroom Attached additions without a private entry and real separation don't give family the independence they need. Detached casitas solve this properly. ### Utility tie-ins nobody wants to quote Water, gas, and electrical connections for a detached structure need permits, trenching, and utility coordination. We handle all of it in-house, inspected and done right. What we do ## ADUs & Guest Casitas in San Antonio, the design-build way Last updated: June 24, 2026 Accessory dwelling units and guest casitas add flexible space for family or rental income. We handle the eligibility questions: Unified Development Code zoning, lot size, setbacks, and owner-occupancy. We also manage utility tie-ins, foundation, and finish to deliver a detached casita or attached suite that fits your lot and your goals. ![ADUs & Guest Casitas detail](/images/features/detached-backyard-casita-san-antonio-stucco-exteri.webp) ### What's included in your ADUs & Casitas project - ✓ Detached backyard casitas - ✓ Attached in-law / mother-in-law suites - ✓ Zoning and lot-eligibility guidance - ✓ Utility tie-ins (water, gas, electrical) - ✓ Rental-income and multi-gen layouts - ✓ Unified Development Code compliance ## Backyard casitas and in-law suites, built right An accessory dwelling unit (ADU) is one of the highest-value remodeling moves a San Antonio homeowner can make. It gives you flexible space for family, rental income potential, or both — and it can add real resale value when done right. ### What kind of ADU fits your lot? - **Detached casita** — a standalone structure in the backyard with its own kitchenette, bath, and entry - **Attached in-law suite** — an addition off the main house with private entry, full bath, and bedroom - **Garage conversion** — converting an existing garage into living space (see our garage-attic-conversions [/garage-attic-conversions/ →](/garage-attic-conversions/) service) We start by checking eligibility under the Unified Development Code — lot size, setbacks, owner-occupancy, and rental rules. Some lots support a 1,200 sq ft casita; others won’t support more than 600. We pre-qualify before we design. ### The utility work matters A detached casita needs its own service: water main and meter, sewer connection, gas line (if you have a stove or tankless heater), and electrical service. The trenching, depth requirements, and metering all need permits and inspections. We coordinate the utility companies along with the city. ### Finish-level expectations A casita is a small house. We build them with the same systems and finish quality as our primary remodels — proper insulation, mini-split or split-system HVAC, full waterproofing in the bath, durable flooring. Skimping on systems in a small structure shows up immediately. Why homeowners pick us ## Same process. Same crew. Same fixed price. ### We pre-qualify your lot before we sell you a project Not every lot in San Antonio supports an ADU — setbacks, lot size, and owner-occupancy rules vary by district. We check the Unified Development Code constraints before you commit to the design. ### Utility tie-ins done right Detached casitas need their own water, gas, and electrical service — properly trenched, metered, and inspected. We handle the utility coordination. ### Finishes that match the main house A casita that looks like an afterthought hurts resale. We design the casita to read as part of the property — same brick, same trim package, same roofing where it makes sense. Portfolio ## ADUs & Guest Casitas portfolio Recently completed projects across Greater San Antonio. ![ADUs & Guest Casitas portfolio image 1](/images/features/detached-backyard-casita-san-antonio-stucco-exteri.webp) ![ADUs & Guest Casitas portfolio image 2](/images/features/casita-interior-kitchenette-open-layout-living-bed.webp) ![ADUs & Guest Casitas portfolio image 3](/images/features/mother-in-law-suite-attached-private-entry-san-ant.webp) ![ADUs & Guest Casitas portfolio image 4](/images/features/casita-bathroom-walk-in-shower-luxury-finish-san-a.webp) ![Completed remodel](/images/misc/luxury-remodeled-san-antonio-home-exterior-at-suns.webp) ## Ready to talk through your ADUs & Casitas project? Free in-home estimate. No commitment. Fixed price locked before any work starts. Get Your Free Estimate [/contact/ →](/contact/) Call (210) 366-2380 [tel:+12103662380 →](tel:+12103662380) What homeowners say ## 4.9 stars across 200+ Houzz reviews 50% of our projects come from direct referrals. Here's why. > "From the first design-center visit to the final walkthrough, we had one point of contact and one price that never moved. Our kitchen is unrecognizable in the best way." Karen M. Alamo Heights · Kitchen Remodel > "They removed a load-bearing wall and turned three cramped rooms into an open living space. The crew was the same faces every day for weeks — that mattered." David R. Stone Oak · Whole-Home Remodel > "Our walk-in shower is gorgeous and finally accessible for my mom. They handled the layout, plumbing, and waterproofing without us chasing anyone." Patricia L. Shavano Park · Bathroom Remodel > "We added an in-law suite and you genuinely cannot tell it wasn't part of the original house — the brick and roofline match perfectly." Miguel A. Schertz · Home Addition > "Transparent budgeting was the whole reason we picked them, and they delivered. No surprise change orders, no hidden fees." Susan & Tom B. Boerne · Kitchen Remodel FAQ ## Common ADUs & Guest Casitas Questions Common questions about our design-build remodeling process. Can I build an ADU on my San Antonio lot? + It depends on your zoning district, lot size, setbacks, and owner-occupancy rules under the Unified Development Code. We check eligibility as the first step — before you spend money on design. How much does a casita cost to build? + Most detached casitas land between $60,000 and $120,000+, depending on square footage, utility runs, and finish tier. Attached in-law suites can be less. Can I rent out my ADU? + Some San Antonio districts allow long-term rental of an ADU; short-term rental rules are stricter. The current Unified Development Code is the source of truth — we walk you through what applies to your specific lot. Do you handle the permits? + Yes. ADUs require structural, electrical, plumbing, and mechanical permits, plus utility coordination. We manage all of it. How long does a casita take to build? + Plan on 5–7 months total: 6–8 weeks for design, engineering, and permitting, then 12–18 weeks of construction. Related services ## Other ways we remodel San Antonio homes ### home additions View service → [home additions →](/home-additions/) ### garage attic conversions View service → [garage attic conversions →](/garage-attic-conversions/) ### whole home remodeling View service → [whole home remodeling →](/whole-home-remodeling/) Helpful guides ## ADUs & Casitas guides & resources Plan your project with our in-depth guides on cost, process, and choices. ### What Is an ADU, and Is It Allowed on My San Antonio Lot? What an ADU is and whether it's allowed on your San Antonio lot — Unified Development Code zoning, lot size, setbacks, and owner-occupancy rules. Read the guide → [What Is an ADU, and Is It Allowed on My San Antonio Lot? →](/guide/what-is-an-adu-allowed-san-antonio-lot/) ### Attached In-Law Suite vs Detached Casita Attached suite or detached casita? Compare privacy, cost, zoning, and multi-gen vs rental use to choose the right secondary dwelling for your home. Read the guide → [Attached In-Law Suite vs Detached Casita →](/guide/attached-in-law-suite-vs-detached-casita/) ### Backyard Casita Cost Guide for San Antonio What a backyard casita costs in San Antonio — utility tie-ins, foundation, finish level, rental-income ROI framing, and financing options. Read the guide → [Backyard Casita Cost Guide for San Antonio →](/guide/backyard-casita-cost-san-antonio/) ![Completed remodel](/images/misc/luxury-remodeled-san-antonio-home-exterior-at-suns.webp) ## Ready to start your ADUs & Casitas project? Free in-home estimate. Fixed pricing locked in our design center. Get Your Free Estimate [/contact/ →](/contact/) Call (210) 366-2380 [tel:+12103662380 →](tel:+12103662380)