With its diverse landscapes and vibrant cities, California is a hub of innovation and design. For homeowners seeking to add functional and stylish living spaces to their properties, Accessory Dwelling Units (ADUs) have become an increasingly popular choice. Whether you envision a cozy backyard cottage, a modern detached studio, or an attached unit for multigenerational living, finding the right builders is essential to turning your ADU dreams into reality.

Our curated list of the best ADU builders in California results from meticulous research and consideration of project portfolios, industry expertise, customer feedback, and overall reputation. These builders stand out for their commitment to excellence, creative solutions, and the ability to seamlessly integrate ADUs into the California lifestyle. Whether you’re in Los Angeles, San Francisco, or anywhere in between, trust these professionals to craft innovative and functional ADUs that enhance the value and utility of your property. 

HDR Remodeling

1889 Alcatraz Ave, Berkeley, CA 94703

HDR Remodeling, a trusted residential design-build remodeling contractor, has served Berkeley, Alameda, Oakland, Piedmont, and the greater East Bay Area for over 30 years. Originally established by Philip Anderson as Honey Do Repair, the company quickly evolved from home maintenance to remodeling, responding to client trust and demand. In 2005, it rebranded as HDR Remodeling, aligning with its roots while positioning itself as a respected design/build remodeling contractor. Ever since, HDR Remodeling has been recognized for excellence through its affiliations with the National Association of the Remodeling Industry (NARI) and the National Kitchen and Bath Association. In 2020, it earned the NARI Regional Contractor of the Year Award for Residential Bath ($50,001 to $75,000).

Highlighted in Piedmont Post and U.S. News & World Report, HDR Remodeling is led by President Chris Fellows. Certified as a Window & Door Winteq Installer and in C2 Asbestos Hazard Safety, Fellows leads a team committed to transforming homes with expertise and integrity. No matter the project type, the firm prioritizes services completed to the highest standards possible.

Murray Lampert Design, Build, Remodel

2851 Camino Del Rio South Ste 310, San Diego, CA 92108

For four generations, Murray Lampert Design, Build, Remodel has been a trusted partner for San Diego homeowners. Going beyond mere construction, the firm initiates meaningful conversations, setting the groundwork for outstanding projects, including homes. Throughout the entire process, Murray Lampert stands by its clients, presenting options and making decisions collaboratively. The firm’s approach hinges on transparency—providing clear insights into what to expect, the associated costs, and the upcoming steps. Any alterations are communicated in advance, nurturing a relationship of trust and understanding.

Affiliated with the Better Business Bureau, Murray Lampert has earned the Guildmaster Award for Service Excellence multiple times, a testament to its commitment to quality. Featured in The San Diego Union-Tribune and Homes & Gardens, the firm values open dialogue and treating clients like family. Led by Gregg Cantor, a seasoned professional with a background in Green Building, Murray Lampert aims to be a partner in realizing its clients’ visions.

Tankersley Construction

11415 Sunrise Gold Cir, Suite 1, Rancho Cordova, CA 95742

Tankersley Construction is a fully licensed, bonded, and insured general contracting firm serving the Greater Sacramento area. Established by Steve and Heather Tankersley, the company has emerged as a trailblazer in California’s residential construction scene. Steve Tankersley, the owner and president, is equipped with a Bachelor’s in Construction Management from Sacramento State University and OSHA 30 certification. Heather Tankersley, the co-owner and vice president, holds degrees from UC Davis and Sonoma State University in construction management and communication studies, respectively. Under their guidance, the firm makes sure to leverage principles from commercial construction, integrating them into small- and mid-sized homeowner projects.

Tankersley actively participates in the National Association of the Remodeling Industry, showcasing its commitment to industry collaboration and excellence. Acknowledged for its prowess, the firm received the 2022 Fastest Growing Companies award from the Sacramento Business Journal, a recognition that speaks volumes about its dynamic approach and growth trajectory. The firm has also been highlighted in Sacramento Magazine, further solidifying its position in the construction landscape. 

Creative Design & Build

9275 Trade Pl Unit H, San Diego, CA 92126

Established through extensive collaboration with major construction firms in Southern California, Creative Designs & Build boasts a 15-year legacy dedicated to refining its expertise. This evolution has shaped it into a highly proficient team, distinguishing itself as a premier service provider for home remodeling and additions in San Diego County, backed by a robust portfolio of successful projects.

Creative Designs & Build holds affiliations with several esteemed organizations such as the National Association of the Remodeling Industry and the National Kitchen and Bath Association, emphasizing its unwavering commitment to industry standards. While the firm’s excellence is not solely defined by accolades, it maintains a notable digital presence, garnering recognition in outlets like Digital Journal. Guided by CEO Lior Scott, an alumnus of Gvanim High School, the firm honors its journey rooted in years of experience and a steadfast dedication to delivering quality services in the realms of design, construction, and remodeling.

Marrokal Design & Remodeling

9474 Kearny Villa Rd #205, San Diego, CA 92126

Marrokal Design and Remodeling, with over four decades of experience in enhancing San Diego homes, is a trusted provider of remodeling services. Known for its innovative and award-winning design-build team, Marrokal specializes in a range of services, including whole-house remodels, kitchen and bathroom transformations, room additions, outdoor living spaces, aging-in-place solutions, and upgrades for extended family living—all implemented with current green building practices. Marrokal acknowledges that its genuine success is rooted in the trust clients instill, allowing the realization of their home visions.

The company’s foundation is built on principles of integrity, quality, and service, resulting in numerous accolades and positive media recognition. For example, the firm received the 2021 Contractor of the Year (CotY) award and has been acknowledged by respected publications like Insider and Kitchen & Bath Design News. The firm operates under the guidance of Vice President and CEO Lori Bryan, who holds a degree in business management from Grossmont College.

Oliver Builders

1031 Pardee St, Berkeley, CA 94710

With 35 years of experience in East Bay construction, Severin Oliver created Oliver Builders, composed of a team uniquely equipped with local expertise. Severin leverages his multifaceted experience as a builder, project manager, and businessman to ensure that Oliver Builders remains as a cornerstone in Berkeley and the greater East Bay. His business seamlessly integrates efficiency and value, delivering high-quality artistry with a personal touch. He leads with a passion for construction and a commitment to community service, ensuring that Oliver Builders remains a trusted name in East Bay construction.

Specializing in residential construction, Oliver Builders navigates challenges inherent in remodeling custom properties within an earthquake-prone environment. Its impressive portfolio includes new homes, second-story additions, kitchens, bathrooms, fine woodwork projects, custom staircases, and high-end finishes. No matter the project type, Oliver Builders is committed to quality craftsmanship and sustainable building, as exemplified by its affiliation with GreenPointRated Builder.

Luxe Remodel

329 N. Wetherly Dr Ste 205, Beverly Hills, CA 90211

Luxe Remodel, a distinguished licensed general contractor based in Southern California, is a premier residential construction choice. With a dedicated team of seasoned contractors and project managers, it handles each project meticulously, ensuring seamless on-site preparation, punctual scheduling, and precise budgeting and cost management. Affiliated with the National Kitchen and Bath Association, Luxe Remodel maintains a commitment to excellence without the need for ostentatious awards. Its focus lies in delivering unparalleled service to clients seeking top-tier residential construction.

Led by founder and CEO Oren Levy, a University of Arizona graduate with degrees in finance and entrepreneurship, Luxe Remodel combines expertise with a personalized touch. Striving for excellence in every endeavor, it remains a trusted partner for those looking to transform their residential spaces with quality craftsmanship and reliable project management.

Jackson Design & Remodeling

4797 Mercury St, San Diego, CA 92111

Since its establishment in 1989, Jackson Design & Remodeling (JDR) has left an indelible mark on the San Diego housing landscape, bringing to life the dreams of countless homeowners through thoughtful construction and renovation projects. JDR specializes in crafting custom homes, comprehensive home remodels, additions, outdoor living spaces, and kitchens, tailoring each endeavor to meet its clients’ unique needs and desires. Under the leadership of Todd R. Jackson, the president and CEO, as well as holding certifications as a Green Professional and Aging-In-Place Specialist (CAPS), Jackson Design & Remodeling continues to shape San Diego’s residential landscape with a dedication to quality craftsmanship and client satisfaction.

Affiliated with esteemed organizations such as the National Association of the Remodeling Industry (NARI) and the National Kitchen & Bath Association (NKBA), JDR has received many accolades over the years, including the 2022 National/Regional CotY (Contractor of the Year) Award from NARI for an entire home project valued between $750,001 and $1,000,000. Press recognition in Qualified Remodeler further attests to its commitment to excellence.