Top ADU Contractors in San Jose (2026)
Vetted professionals specializing in custom builds, prefabs, and garage conversions. Average San Jose costs range around $340,000.
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We pre-screen San Jose ADU contractors for licensing, insurance, and ADU-specific experience. Match request takes 60 seconds.
Get 3 free quotes from vetted San Jose ADU builders
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How We Select Contractors
Featured San Jose ADU Builders
Cottage
Bay Area ADU specialists with strong San Jose permitting experience and fixed-price contracts.
Acton ADU
Factory-built ADUs. Pre-approved designs speed up San Jose permitting to 4–8 weeks.
Villa Homes
Zero-down ADU builder that handles design, permits, construction, and financing in one package.
Symbium
Uses AI to analyze your lot and recommend optimal ADU placement. Fast permitting with pre-approved plans.
GatherADU
End-to-end ADU service from feasibility study through construction. Experienced with San Jose zoning.
Greatland Construction
Premium custom builder with deep experience in Silicon Valley's seismic requirements and hillside builds.
Get 3 free quotes from verified San Jose ADU builders
We pre-screen San Jose ADU contractors for licensing, insurance, and ADU-specific experience. Match request takes 60 seconds.
Get 3 free quotes from vetted San Jose ADU builders
No spam. No obligation. Avg response time: 1 business day.
We never sell your data. You control which builders contact you.
ADU Contractor Red Flags
- Requires more than 10% down payment upfront
- Doesn't handle the permitting process
- Gives an estimate without seeing the property
- Lacks specific ADU portfolio (just general remodeling)
- Pressures you to sign immediately
Contractor FAQ
Track Every Dollar of Your ADU Build
TerraLine is the construction finance cockpit that shows your loan balance, budget burn, and forecast at completion — all on one screen. No more spreadsheets.
Get 3 free quotes from verified San Jose ADU builders
We pre-screen San Jose ADU contractors for licensing, insurance, and ADU-specific experience. Match request takes 60 seconds.
Get 3 free quotes from vetted San Jose ADU builders
No spam. No obligation. Avg response time: 1 business day.
We never sell your data. You control which builders contact you.