25% OFF Design Fees
Start your ADU project now and secure this exclusive savings
Los Angeles ADU Experts
We handle design, permits, and construction for a seamless, high-quality ADU
Get a FREE ADU Estimate
Guaranteed on-time completion
If we miss your ADU deadline, we pay you $50 per day until the project is finished.
Direct communication with me and my team
You’ll work directly with the people designing and building your ADU, with clear and consistent updates.
Only 2 ADU clients per month
We limit our build schedule so every project gets full attention, better execution, and higher quality results.
Deep-clean, move-in ready delivery
Your ADU is delivered clean, finished, and ready to use the moment we hand it over.
Types of ADU’s
Detach ADU
A detached ADU adds value, privacy, and flexibility to your property. It’s perfect for guests, family, or rental income offering an independent, energy-efficient space that enhances your home and future investment.
Garage conversion
Transform your garage into a stylish living space or rental unit — a fast, affordable way to add value and comfort to your home.
Attached ADU
An attached ADU adds connected living space for family, guests, or rental income while increasing your home’s value and functionality.
Why AT Builders?
Expertise
With years of hands-on experience in ADU design and construction, our team understands every detail — from city permits to modern layouts. We combine technical skill with creative insight to deliver ADUs that maximize space, function, and comfort while fitting seamlessly into your property.
QUALITY
At AT Builders, quality isn’t just a goal — it’s our foundation. We use premium materials, proven building methods, and detailed craftsmanship to ensure your ADU is built to last. Every project is completed with precision, transparency, and care from start to finish.
Portfolio
Our portfolio speaks for itself. From detached backyard units to garage conversions and room additions, our completed ADUs showcase both versatility and excellence. Explore our projects to see how AT Builders transforms ordinary spaces into modern, livable extensions of your home.
About Us
At AT Builders LLC, construction isn’t just what we do—it’s who we are. Born from a family tradition and a passion for building, we are dedicated to crafting homes that blend luxury with livability. From new construction and custom homes to renovations and ADUs, every project is approached with the same commitment: to create spaces that inspire and stand the test of time.
Serving the greater Los Angeles area, we pride ourselves on trust, craftsmanship, and transparency. Our clients aren’t just building projects—they’re building dreams. We’re honored to bring those visions to life with precision, care, and a personal touch that makes every home uniquely theirs.
Frequently Asked Questions
Get answers to the most common questions homeowners have about building an ADU with AT Builders.
What is a Design-Built Firm?
A Design-Build firm like AT Builders handles your entire ADU project—from initial design and city permits to final construction—all under one roof. This streamlined approach saves you time, money, and stress.
How Much will my ADU Project cost?
Costs depend on size, layout, finishes, and site conditions. On average, ADU projects in Los Angeles range from $150K to $300K. We provide transparent, itemized estimates so you know exactly what to expect before construction begins.
How Long does it take to complete and ADU
Most ADUs take 6–8 months from design to completion, depending on permitting and complexity. Our team keeps you informed every step of the way through our project management portal.
Do you handle permits and inspections?
Yes, we take care of all city permits, plans, and required inspections. Our in-house experts ensure your ADU meets local zoning and building codes for a hassle-free experience.
What type of warranty do you offer?
AT Builders provides a 1-year workmanship warranty and a 10-year structural warranty for peace of mind. We stand behind our work long after your ADU is complete.