CALIFORNIA HOMEOWNERS

California ADU Design-Build Firm

Unlock the potential of your property with California’s ADU design-build firm — backed by a statewide network of licensed ADU contractors, and the informational hub for ADU costs, laws, permits, and designs.

BUILDING EXCEPTIONAL ADUS IN EVERY CITY

ADU CITIES: CALIFORNIA ADU DESIGN-BUILD SPECIALISTS, CSLB#1138550

0% FINANCING AVAILABLE — Build your ADU now and pay over time.  See your options →

What We Build

Four proven ADU paths, transparent pricing, and a process refined over 30+ years and 100+ projects. Explore:

Garage Conversion ADUs

The fastest, most affordable path to a permitted living space.

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Attached ADUs

Expand your home with a seamless, private second living space.

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Detached ADUs

A fully independent backyard home — our most popular build.

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Second-Story ADUs

Build up, not out. Keep your yard, gain a full second home.

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Pricing & Financing

Honest $100K–$450K pricing and 0%-interest financing options.

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Our Process

From first call to move-in — exactly what to expect.

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MODERN, TAILORED, ADU EXCELLENCE

At ADU Cities , we pride ourselves on constructing modern, efficient, and personalized accessory dwelling units that represent the forefront of ADU (Accessory Dwelling Unit) innovation. Our builds are a testament to contemporary design fused with functionality, each one carefully tailored to meet the unique needs and aesthetic preferences of our clients. We meticulously craft every ADU to not only enhance living spaces but to also embody the latest trends in space-saving design and energy efficiency. With us, your vision of an ideal ADU is transformed into a sophisticated and sustainable reality.

Modern detached ADU cottage exterior in California

ADUs: Your Home’s Very Own Mini-Me

An ADU, or Accessory Dwelling Unit, is essentially a secondary living space on your property. Think of it as a mini-home that can come in the form of a cozy backyard cottage, a transformed garage, or even a part of your existing home that’s been sectioned off. ADUs are complete with all the essentials: a kitchen, bathroom, and sleeping area. They’re perfect for hosting family, renting out for extra income, or just expanding your living space. It’s like adding a new, small house to your property without the fuss of buying another plot of land.

DESIGNING. DEVELOPING. ENGINEERING. CONSTRUCTING.

REFINED DESIGN-BUILD MASTERY FOR YOUR ADU

At ADU Cities, our design-build process is a symphony of precision, honed through decades of hands-on experience in the heart of California. We’ve refined our approach to be as efficient as it is effective, ensuring that from the initial sketch to the final nail, every step is streamlined and transparent. Our team collaborates closely with homeowners, navigating the intricacies of design, permits, and construction with a practiced ease that only comes from years in the field. This seamless integration of services not only saves time and stress but also allows for the highest standards of quality to be embedded in every aspect of your new ADU. With ADU Cities, your project is in the hands of skilled artisans who are as passionate about building the perfect ADU for your space as you are about enjoying it.

CONCEPTUALIZE & DESIGN

We distill your dreams into architectural designs, tailor-made for SoCal’s unique style and your personal needs.

NAVIGATE & SECURE PERMITS

Our seasoned team expertly handles the complex permit process, ensuring your ADU meets all local compliance standards with ease.

BUILD & PERFECT

Leveraging the latest in construction excellence, we meticulously turn your ADU designs into a finished masterpiece of modern living.

Backyard ADU cottage at golden hour
Aerial view of home with detached ADU
Attached ADU addition exterior
Aerial view of home with detached ADU

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When we decided to add an ADU to our home in California, we were overwhelmed by the options and regulations. Then we found ADU Cities. From our very first meeting, they listened to our needs and provided clear, creative designs that made the most of our space. Their team guided us through the permitting process without a hitch, and the construction was so efficient and clean, it was hard to believe we were in the middle of a build. The end result was a beautiful, modern ADU that felt like it was always meant to be a part of our home. We couldn’t be happier with the service and the final product. Thank you, ADU Cities, for making our dream a reality!”

— Jordan & Alex R., Los Angeles, CA

EMBRACE SOCAL LIVING: CRAFT YOUR DREAM ADU WITH US NOW

ONE CALL COVERS ALL OF CALIFORNIA

Our own crews design, permit, and build ADUs across Southern California — and through the ADU Cities contractor network, homeowners anywhere in the state get matched with vetted, licensed local ADU builders. Call 562.810.1965 and we’ll get your project moving, wherever you are in California.

Before & After

Drag the slider — a recent full exterior transformation by the ADU Cities design-build team.

An ADU Takes Shape

Same project, same backyard — the home in the slider above also gained an ADU out back. Here is the build, start to finish.

BEFORE — the original backyard.

UNDER CONSTRUCTION — framed and sheathed.

FINISHED — the ADU, with its own deck and yard.

Unlocking ADU Basics: Your Curiosities, Our Clear Answers!

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