Accessory Dwelling Units
in Austin, TX
J. Angelo Design Build
Whether you're searching for an Accessory Dwelling Unit (ADU), casita, guest house, backyard home, or in-law suite, building an additional living space on your property is one of the most effective ways to expand your home's functionality and long-term value.
Austin ADU Builders
At J. Angelo Design Build, we specialize in custom ADUs in Austin that are thoughtfully designed around your property, lifestyle, and architectural style. As an experienced Austin ADU builder, we guide homeowners through every phase of the project—from early feasibility and design through permitting and construction—creating spaces that feel intentional, cohesive, and built to last.
Custom ADUs
Building an ADU is much more than adding another structure to your property. Every project requires careful planning to ensure the new space complements the existing home while meeting Austin's zoning, permitting, and building requirements.
As a full-service ADU design-build contractor in Austin, we coordinate every aspect of the project under one team. Whether you're planning a detached ADU, attached ADU, luxury casita, guest house, or private backyard home, our focus is on creating a finished space that feels like a natural extension of your property.
Custom Casitas, Studios, & Home Offices
Every homeowner has different goals for their ADU.
Some homeowners want a private guest house for visiting family and friends. Others are creating an in-law suite for multigenerational living, a home office, fitness studio, or independent living space.
Whatever your vision, every ADU is custom designed to maximize your property while complementing the architecture of your existing home.
Our Design-Build Process
Building an ADU involves much more than construction.
Successful projects begin with evaluating your property, understanding zoning regulations, determining the best building location, and developing a design that balances functionality, aesthetics, and investment.
As a custom ADU builder in Austin, our integrated design-build process provides a clear path from concept through completion.
We coordinate:
- Feasibility studies
- Site evaluation
- Design development
- Architectural design
- Engineering
- Permit management
- Construction
- Final inspections
- Warranty support
By aligning these decisions early, we reduce uncertainty and help create a more predictable construction experience.
Every Project Begins With Feasibility
Every ADU project starts with an initial feasibility consultation.
During this phase, we evaluate:
- Your property
- Existing utilities
- Building setbacks
- Tree impacts
- Site grading
- Overall project goals
- Budget expectations
- Austin zoning requirements
If you're starting from scratch, we'll assemble the right design team and guide the project from concept through construction.
If you already have architectural plans, we'll review them for constructability, budgeting, and overall project alignment before construction begins.
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What You Can Expect
Building an ADU is an opportunity to create flexible living space that enhances both your lifestyle and your property's long-term value. Whether you're planning a luxury casita, guest house, or backyard home, every project should feel like a natural extension of your existing home.
At J. Angelo Design Build, we create custom ADUs that are thoughtfully designed around your property, architecture, and goals. From the first conversation to the finished space, you can expect expert guidance, clear communication, and craftsmanship that delivers a seamless addition to your home.
Our Projects
Projects may include, but are not limited to:
- Detached ADUs
- Attached ADUs
- Luxury Casitas
- Guest Houses
- Backyard Homes
- In-Law Suites
- Multigenerational Living Spaces
- Home Offices
- Pool Houses with Living Quarters
- Private Studios and Wellness Spaces
Austin ADU FAQs
What Is an ADU?
An Accessory Dwelling Unit (ADU) is a secondary living space built on the same property as a primary home. Often called a guest house, backyard home, or casita, an ADU can serve as housing for family members, guests, a home office, or even a long-term rental, depending on local regulations.
How Much Does It Cost to Build an ADU in Austin?
The cost to build an ADU in Austin depends on the size, site conditions, design, and level of finishes. At J. Angelo Design Build, attached ADUs typically start around $400,000, while detached ADUs generally range from $450,000 to $700,000 for luxury custom construction.
Is an ADU a Good Investment?
For many homeowners, an ADU is an excellent long-term investment. In addition to increasing usable living space, it can improve property value, provide flexible housing for family members or guests, and create future rental income opportunities where permitted.
What's the Difference Between an ADU and a Casita?
A casita is simply a common name for a small, detached guest house, while an ADU is the legal term used by municipalities like Austin. Most casitas qualify as Accessory Dwelling Units, although not every guest structure meets the zoning and building requirements to be considered an ADU.
How Do You Find the Best ADU Builder in Austin?
Look for an experienced design-build firm that understands Austin's zoning regulations, permitting process, and custom residential construction. The best builders provide transparent communication, realistic budgets and timelines, and a proven process that integrates design, planning, and construction into one coordinated experience.
Our Process
Our process begins with a complimentary consultation to understand your vision, lifestyle, budget, and goals, and to determine whether you already have plans in place or need guidance through the design process.
Whether you already have plans or need help developing them, we guide the design process with feasibility planning, budget alignment, and ongoing cost feedback to ensure your project is fully defined and ready for construction.
Construction begins with a clear, well-defined plan, supported by active project oversight, consistent communication, and real-time updates via our client portal, keeping your project moving efficiently from start to finish.
As your project nears completion, we focus on executing the final details, conducting thorough quality reviews to ensure every finish, fixture, and feature aligns with the design vision and meets our standards of craftsmanship.
Before project completion, we conduct a final walkthrough to confirm every detail meets expectations, then continue supporting you after move-in with responsive warranty service and ongoing care.
Why Choose J. Angelo Design Build?
As an award-winning Austin design-build firm, we approach every ADU as part of the entire property, not simply a separate building.
We believe intentional planning creates better outcomes.
Our team provides:
- Design-build services whether you have plans or don't have plans
- Transparent communication
- Experienced project leadership
- Client portal access throughout construction
- High-end craftsmanship and a broad portfolio
- A coordinated process from feasibility through warranty
The result is a custom ADU that feels intentional, functional, and seamlessly integrated with your home.
Start Planning Your Custom ADU
Whether you're planning a luxury casita, guest house, backyard home, or custom ADU, our team is ready to help you evaluate your property and create a plan that fits your goals. Take a look at both our remodeling and custom home cost guides for an idea of what goes into the price of your ADU.
Contact Our Team of Experts Today!
Where We Work
Central Austin
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Allandale
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Balcones
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Barton Hills
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Bouldin Creek
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Brentwood
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Crestview
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Clarksville
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Hyde Park
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North Loop
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North University
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Old West Austin
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Rosedale
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Travis Heights
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Zilker
South Austin
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Bear Creek
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Buda
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Circle C
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South Austin (general area)
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South Lamar
West Austin/Hill Country
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Barton Creek & Barton Creek West
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Bee Cave
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Davenport Ranch
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Driftwood
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Great Hills
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Highland Hills
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Highland Park
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Horseshoe Bay
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Lakeway
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Lost Creek
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Marble Falls
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Rollingwood
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Spanish Oaks
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Steiner Ranch
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Tarrytown
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The Hills
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West Lake Hills
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Westover Hills
- Wimberley
East Austin
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East Austin (general area)
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Cherrywood
Northwest Austin
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Great Hills
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Northwest Hills
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Spicewood
