109 Best ADU Builders in San Diego, California
Verified ADU contractors and builders in San Diego, CA
Showing 1–30 of 109 listings — Page 1 of 4
Adama Builders
ADU Geeks
Specializing in accessory dwelling unit construction throughout San Diego, we transform properties with expertly built ADUs that maximize your home's potential and value. From design consultation through final inspections, our team handles every aspect of ADU development with precision and local expertise.
ADU Home Pros
ADU O’SIDE
ADUPALS
San Diego homeowners looking to maximize their property value can trust this experienced ADU contractor to design and build accessory dwelling units that seamlessly integrate with existing homes. From initial planning through final construction, they specialize in creating compliant, high-quality living spaces that meet local building codes and your family's unique needs.
ADUs & Garage Conversions | Sprawl Design
Advance Construction Company - San Diego General Contractor / ADU Specialist
AH Construction
Aligcus ADU
All Pro Contractor
Alpha Advantage Home Builders, INC
ALS Construction, Inc.
Antoon Construction Services
Apex American Homes
Apex Ridge Construction
AUnited ADU Design and Construction
Bernal Builders, Inc
Better Place Design & Build
Brikho Construction | General Contractors San Diego
Build Wize LLC
Building Contractors San Diego
CB Custom Construction Inc
Coach Construction Inc
Coastal Renovations & Developments
Complete Builders Inc
Creations Construction & Remodeling
Creative Design & Build Inc
Crest Backyard Homes
Crest Backyard Homes is dedicated to helping homeowners maximize their property’s potential by navigating the ADU process and providing the most comprehensive set of options for your property's ADU needs.
CRS Builders Inc
D & L Builders Inc.
Frequently Asked Questions — ADU Builders in San Diego
How much does it cost to hire an ADU builder in San Diego?
ADU construction costs in San Diego, California vary widely depending on size, type, and site conditions. Detached ADUs typically range from $150,000–$400,000+, while garage conversions and attached ADUs can be more affordable. Contact multiple builders in San Diego to get accurate quotes for your specific project.
How long does it take to build an ADU in San Diego?
In San Diego, the ADU construction timeline typically ranges from 6 to 18 months from permit application to move-in. Permitting alone can take 2–6 months depending on California local regulations. Prefab and modular ADUs often have faster timelines than site-built units.
Do I need a permit to build an ADU in San Diego?
Yes, a building permit is required for ADU construction in San Diego, California. Your ADU builder will typically handle the permit application as part of their service. California has adopted streamlined ADU permitting laws in recent years, which may reduce wait times.
What types of ADUs can be built in San Diego?
Common ADU types in San Diego include detached ADUs (backyard cottages), attached ADUs, garage conversions, basement conversions, and prefab/modular ADUs. The best type for your property depends on lot size, zoning, and budget. A local San Diego ADU builder can advise on what's allowed on your specific parcel.