ADU builder in San Diego, CA
Room for one more household, right in your backyard.
Detached ADUs, garage conversions, attached units and junior ADUs across San Diego. We draw it, permit it and build it. Licensed & insured.
Why San Diego owners build
Rent from a second unit · Space for parents or grown kids · A quiet home office · More value from the same land
Check my lot
How much does an ADU cost in San Diego?
As of October 2026, San Diego builders publish ranges of roughly $100,000 to $225,000 for most garage conversions and about $250,000 to $460,000 for new detached ADUs. Design, engineering, permit fees and utility runs can sit on top. Size, lot conditions and finish level decide where your project lands.
We visit, measure and then hand you a written, itemized quote. Read the San Diego ADU cost guide.
What can we build on your lot?
Every build includes design and permits. Torn between reusing the garage and starting fresh? Compare the two.
How does a project move from idea to keys?
- Step 1Lot checkWe pull zoning, overlays and utility locations for the address.
- Step 2PlansA layout sized to your yard, budget and how you will use it.
- Step 3City reviewWe file with the right permit office and answer every correction.
- Step 4ConstructionFoundation to final inspection, with updates at each stage.
Where in San Diego County do we work?
The City of San Diego plus four neighboring cities. Each one runs its own permit office and adds local standards to state ADU law.
Find out what your lot allows
Tell us where the property is and what you have in mind. We read the zoning and ADU rules for that address, then reply with what could fit. Serving San Diego, Chula Vista, La Mesa, El Cajon and Escondido.