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
Get a Free Estimate in San Jose
Next Day response for San Jose residents.
Text UsGet a Free EstimateCall NowADU Services in San Jose
Detached ADUs, garage conversions, attached additions, and JADUs, each specified with premium materials built to last for San Jose homeowners and Santa Clara County properties
Detached ADU Construction
A standalone backyard ADU built with premium-grade materials chosen for decades of low-maintenance durability.
Garage Conversion ADU
A legal, permitted living unit finished with the same durable materials as our ground-up builds.
Attached ADU Addition
An addition built onto your home with finishes selected to match and outlast the original structure.
Junior ADU / JADU
Up to 500 sq ft finished with the same durable, premium materials as our larger ADUs.
ADU Design & Planning
Design and planning that specifies premium, long-lasting materials before construction ever starts.
ADU Permits & Approvals
Permit expediting for Los Gatos and Santa Clara County, so your durable-materials build starts on schedule.
Multi-Unit & Multifamily ADUs
Multiple ADUs per lot, each built to the same premium-materials standard, including SB-9 lot splits.
Custom ADU Build-Out
Custom kitchens, baths, and finish-out selected for long-term durability, not just first impressions.
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 that specs premium materials as standard, not an upgrade
Licensed & Insured
Fully licensed California general contractor, bonded and insured, specializing in ADU design-build projects.
Materials Chosen for the Long Run
Architecture, engineering, permitting, and construction from a single accountable team, with premium, durable products specified from the first drawing.
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
Get a Free ADU Estimate in San Jose
2 minutes is all we need. Tell us about your San Jose project and get a personalized estimate.