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ADU Designers & Builders

California

ADU Builders, ADU Designers

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Website

https://adudesignbuild.net/

ADU Designers & Builders is a Fullerton-based ADU builder and design firm serving homeowners throughout Southern California. Specializing in accessory dwelling unit design, permitting, and construction, the company provides complete end-to-end ADU solutions tailored to a wide range of residential properties and homeowner goals.

Backed by decades of combined experience in construction, structural engineering, and architectural design, their team manages every stage of the ADU process — from planning and permitting through final construction. Their construction professionals have overseen large-scale multi-family housing developments across California, bringing that same level of expertise and project management to residential ADU projects.

Full-Service ADU Design & Construction

ADU Designers & Builders offers a variety of ADU construction solutions designed to fit different lot layouts and living needs.

Their services include:

Detached ADUs and backyard cottages
Attached ADUs and in-law suites
Garage conversion ADUs
Upper-floor and JADU conversions
Structural engineering and plan design
Permit processing and city coordination

Their in-house team handles the full permitting and approval process with cities and counties across Southern California, simplifying what can often be a complex process for homeowners.

Additional Services

Beyond construction, ADU Designers & Builders also offers several complementary services that help improve long-term project value and efficiency.

Financial Planning Support

The company offers financing guidance and programs that may allow qualified homeowners to finance up to 50% of project costs at 0% interest for 60 months.

Solar Panel Integration

Working alongside solar specialists, they help homeowners incorporate energy-efficient solar systems into ADU projects for long-term savings and sustainability.

Title 24 Compliance

Their team manages California Title 24 energy compliance requirements, helping ensure projects meet all state efficiency standards.

Commitment to Quality

ADU Designers & Builders focuses on creating functional, energy-efficient, and well-integrated accessory dwelling units that add long-term value to residential properties. Their combination of engineering expertise, construction experience, and full-service project management helps homeowners navigate the ADU process with greater confidence and clarity.

Business Hours

Monday: 9:00AM - 5:00PM
Tuesday: 9:00AM - 5:00PM
Wednesday: 9:00AM - 5:00PM
Thursday: 9:00AM - 5:00PM
Friday: 9:00AM - 5:00PM
Saturday: By Appointment
Sunday: CLOSED

Service Area

California

Facebook

https://www.facebook.com/profile.php?id=61558382715836

Instagram

https://www.instagram.com/adu.design.build

2461 East Orangethorpe Avenue, Suite #231, Fullerton, California 92831, United States

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