Detached ADU Construction in San Jose, CA
A detached ADU is a fully independent living unit built in your backyard — its own foundation, kitchen, bathroom, and entrance, completely separate from your main house. It's the most flexible ADU type: private for a family member, or a strong standalone rental.
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Detached ADU Construction in San Jose
We design and build detached ADUs up to approximately 1,200 sq ft, sized to San Jose's ADU standards and your lot's setback requirements. Typical projects run $250,000–$400,000 depending on size, finish level, and site conditions like grading and utility connections.
Every detached ADU project starts with a free on-site consultation where we walk your property, review setbacks and utility access, and talk through layout options — studio, one-bedroom, or two-bedroom configurations. From there we handle architectural design, San Jose Municipal Code 20.30.150 compliance and permit submittal, and full construction through final inspection.
Because a detached unit sits apart from your home, it offers the most privacy of any ADU type — ideal for aging parents, adult children, or a long-term tenant. We design each unit's exterior to complement your main house's style so the finished property reads as a cohesive whole.
How big can a detached ADU be in San Jose?
San Jose allows detached ADUs up to approximately 1,200 sq ft, subject to lot size, setbacks, and lot coverage limits. We confirm the maximum buildable size for your specific property during a free consultation.
Licensed & insured California general contractor
Design, San Jose permitting, and construction handled in-house
Free, no-obligation on-site consultation
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Ready to add an ADU, garage conversion, or in-law suite? Text us for a free, no-obligation consultation and estimate anywhere in San Jose & Santa Clara County.
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