ADU Contractor in San Jose, CA
Detached ADUs, garage conversions, attached additions, and JADUs -- full design-build in San Jose and surrounding Santa Clara County.
ADU Contractor in San Jose, CA
San Jose covers a huge range of lot types and zoning districts, and our ADU projects there range from detached backyard units in Willow Glen-adjacent neighborhoods to garage conversions near downtown. We handle San Jose's ADU permitting process alongside our Los Gatos and Santa Clara County work.
Services Available in San Jose
Why San Jose Homeowners Choose Us
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Detached ADUs, garage conversions, attached additions, and JADUs -- full design-build for San Jose homeowners and Santa Clara County properties
Detached ADU Construction
Standalone backyard ADU, full design-build from foundation to finish.
Garage Conversion ADU
Convert your existing garage into a legal, permitted living unit.
Attached ADU Addition
ADU built onto your existing home, ideal for tighter lots.
Junior ADU / JADU
Up to 500 sq ft within your home's existing footprint.
ADU Design & Planning
Architectural design, site planning, and Title 24 compliance.
ADU Permits & Approvals
City/county permit expediting for Los Gatos and Santa Clara County.
Multi-Unit & Multifamily ADUs
Multiple ADUs per lot, including SB-9 lot-split projects.
Custom ADU Build-Out
Custom kitchens, baths, finishes, and aging-in-place features.
How Your ADU Project Works in San Jose
One team, from your first consultation through final inspection.
Free Site Consultation
We walk your San Jose property, review setbacks and lot coverage, and discuss your goals and budget. No cost, no obligation.
Design & Permits
Our team handles architecture, engineering, Title 24 compliance, and the full permit submission with the City of San Jose.
Construction & Handoff
Foundation through final finishes, with regular updates from a dedicated project manager, then a final walkthrough and warranty documentation for your San Jose project.
ADU Service Area Near San Jose, CA
ADU Contractor Los Gatos covers San Jose, CA and the surrounding Santa Clara County area
ADU Service Area
Real, licensed ADU construction across Los Gatos and every neighboring South Bay city — real municipal boundaries, not a schematic.
Areas We Serve
Don't see your city listed? We likely still cover it — reach out and ask.
Materials We Build With
Every ADU is built with trusted, warrantied materials from established manufacturers
We work with manufacturer-certified materials and pass along full manufacturer warranties.
Why San Jose Homeowners Choose Us
A dedicated ADU contractor, not a general remodeler taking on a side project
Licensed & Insured
Fully licensed California general contractor, bonded and insured, specializing in ADU design-build projects.
Design-Build Under One Roof
Architecture, engineering, permitting, and construction from a single accountable team -- no hand-offs, no finger-pointing.
San Jose Permitting Experience
From downtown-adjacent lots to Willow Glen and beyond, we navigate San Jose's ADU review process across a wide range of zoning districts.
Frequently Asked Questions -- San Jose, CA
Common questions about ADU construction in San Jose, CA
Does San Jose's ADU process differ by neighborhood?
Zoning and lot patterns vary widely across San Jose, from downtown-adjacent infill lots to larger properties near Willow Glen. We confirm your specific zoning district and buildable envelope before design begins.
How much does an ADU cost in San Jose?
San Jose detached ADUs typically run $250,000-$450,000+, with garage conversions often 20-35% less. Costs vary by neighborhood based on lot access and existing structure condition.
How long does San Jose ADU permitting take?
State law caps ministerial ADU review at 60 days. San Jose processes a high volume of ADU applications, so a complete, well-prepared package helps avoid extra review cycles.
Can I build an ADU on a multifamily-zoned San Jose lot?
Often yes, and multifamily parcels can sometimes support more than one ADU. We review your zoning and lot configuration during a free feasibility consultation.
ADU Services & Service Areas Near San Jose, CA
Full design-build ADU services across San Jose and Santa Clara County.
ADU Services
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