Official Casita Contractor Build Your San Antonio Casita (ADU)
Legacy Home Improvements is on the City of San Antonio's official Casita Contractor List. We manage your entire project from plans to keys, including up to $35,000 in City incentives.
Over 25 years building San Antonio. Trusted by the City. Chosen by homeowners.
Get Your Free ConsultationCheck Your Incentive Eligibility $35K Max Incentive 5 Permit-Ready Plans Casita ContractorCity of SA Casita Program 25+ YearsSince 1999 Licensed, Bonded & InsuredFull coverage Up to $35KCity forgivable loans What is a Casita (ADU) in San Antonio?
A casita, also called an ADU (Accessory Dwelling Unit), is a small, self-contained home built on the same lot as your primary residence. Think of it as a guest house, in-law suite, mother-in-law suite, or backyard cottage with its own kitchen, bathroom, and entrance.
Whether you call it a casita, ADU, guest house, granny flat, backyard home, or in-law suite, Legacy Home Improvements is the San Antonio casita builder and ADU contractor homeowners trust to make it happen. We are on the City of San Antonio's official Casita Contractor List and have been building across Greater San Antonio since 1999.
Earn Rental Income
Rent your casita for steady monthly income, or live in the casita and rent your main house.
House Family & Friends
Provide independent living space for aging parents, adult children, or guests, right in your backyard.
Build in 3–6 Months
With permit-ready plans and Legacy's expertise, your casita can be complete in as little as 3 months.
Your Full-Service Casita Contractor in San Antonio
As San Antonio's trusted casita builder and ADU contractor, we handle every step of your casita build so you don't have to.
Plan Selection & Design
Choose from 5 permit-ready plans or create a custom design that fits your lot and goals.
Incentive Assistance
We walk you through the City's forgivable loan program, up to $35,000, and help with your application.
Permits & Approvals
We coordinate with Development Services to pull permits and manage all inspections.
Full Construction
From foundation to finish, framing, plumbing, electrical, roofing, and final walkthrough.
City-Approved Permit-Ready Plans
Choose from 5 pre-approved designs reviewed by the City's Development Services Department. Plans range from 375 to 800 sq ft , all accessible, all ready to build.
Plan 1 HDRC OK The Maricela
375 sf1 BR / 1 BA A medium-size, accessibly designed stand-alone casita. Includes kitchen, dining area, washer/dryer space, HVAC, and porches. HDRC approved for Historic Districts.
Plan 2 The Santiago
675 sf2 BR / 1 BA A spacious casita that can be built horizontally or vertically on the lot. Also available as a 555 sq ft one-bedroom option.
Plan 3 Hideaway Haven
490 sf1 BR / 1 BA Fits well in San Antonio's neighborhoods. Features energy efficiency with standard wood framing and dual-pane windows, plus optional salvaged wood siding.
Plan 4 Inside Out
794 sf2 BR / 1 BA A nod to San Antonio's porch culture. Large shaded porch keeps the casita cooler in Texas summers. Two bedrooms, one bathroom, living area, and kitchen.
Plan 5 Hinter Haus
800 sf1 BR / 1 BA2-Story The largest permit-ready option at 800 sq ft. Two-story mass timber casita with loft, metal roof, and SIP panel technology for fast-track construction.
View Plans & Get Free ConsultationSchedule Free Consultation → Applications Open NowUp to $35,000 in City Incentives
The City of San Antonio's Casita Incentives Pilot Program offers no-interest, forgivable loans to help you build. Legacy will help you apply and maximize your benefits.
- Level I: Up to $25,000 (5-year forgivable loan)
- Level II: Up to $35,000 (10-year forgivable loan)
- Up to $4,500 design fee reimbursement
- City permit & SAWS fee waivers
Check If You Qualify, It's Free $35K Maximum Forgivable Loan 💡 What is a Forgivable Loan?
A forgivable loan is money the City gives you to build your casita, and you never have to pay it back as long as you meet the program requirements (like keeping the casita as a rental at affordable rates for the compliance period). No monthly payments, no interest. After the term is up, the loan simply disappears.
Quick Eligibility CheckDo You Qualify for City Incentives?
Answer 3 quick questions to see what forgivable loans you may be eligible for.
3 Quick Questions
1. Are you the property owner or the future renter? I own the property (building the casita) I'll be renting the casita 2. How many people live in your home?Count everyone, yourself, spouse, children, dependents.
3. What's your total household income per year?Combined annual income before taxes.
Disclaimer: This tool provides a general estimate based on publicly available program guidelines. Actual eligibility is determined solely by the City's Neighborhood & Housing Services Department.
Your Results Will Appear Here
Answer the 3 questions and click "See My Results" to find out what you may qualify for.
Be PreparedWhat You'll Need to Apply
The City's application doesn't save your progress, so have everything ready before you start. Legacy helps you gather and organize all of this.
Income Documentation
Prior year's tax documents OR 2 months of bank statements for each household member over 18.
Proof of Financing
A loan statement, loan guarantee, or bank statement showing available funds greater than the project cost.
Texas Driver's License
Photo of your Texas DL, plus a photo for all household members over 18.
Property ID & Zoning
Your property ID from Bexar County and zoning designation from the City's One Stop Map.
Bexar County Property LookupSA One Stop Zoning Map Proof of Citizenship
Copy of Social Security Card or Residential Permit.
Know Your AMI
Determine your household size and total income, then calculate your AMI percentage.
City AMI Estimator Legacy handles the hard part. Book a free consultation and we'll walk you through every document and step.
Get HelpHow It Works
We handle the entire process from start to finish.
1 Choose Plans
Select from 5 permit-ready plans or bring your own design
2 Check Financing
We help you explore loans and City incentives
3 Hire Legacy
We manage every detail of your project
4 Get Permits
We handle City permits and inspections
5 Build & Enjoy
Construction in 3–6 months, then move in
San Antonio Casita & ADU FAQ
Common questions about building a casita or ADU in San Antonio, Texas.
Why San Antonio Homeowners Choose Legacy as Their Casita Builder
Legacy Home Improvements is one of the few contractors on the City of San Antonio's official Casita Contractor List. Here's what sets us apart as a casita and ADU builder.
Official City Casita Contractor
Verified and listed by the City of San Antonio. We meet all municipal requirements for casita construction in Bexar County.
25+ Years in San Antonio
Building across Greater San Antonio since 1999. We know the local building codes, permitting process, and neighborhoods inside and out.
Incentive Experts
We help you navigate the City's forgivable loan program to maximize your savings. Up to $35,000 in incentives plus fee waivers.
Permit-Ready Plans
5 architect-designed, City-approved plans from 375 to 800 sq ft. Skip the design phase and start building faster.
Premier Contractor Status
The first roofing company to earn San Antonio's Premier Contractor designation. Top 1% of San Antonio contractors.
Complete Build Service
We handle everything: design selection, incentive applications, permits, inspections, and full construction from foundation to keys.
Ready to Build Your Casita?
Get a free consultation with Legacy Home Improvements. We'll assess your property, review incentive eligibility, and create a custom plan.
Start Your Free ConsultationCall (210) 272-7272