Garage Renovation Cost in San Jose
Updated April 19, 2026
Garage renovation costs in San Jose average $82–$165 per square foot at standard quality — 65% above the US national average. A 400 sq ft San Jose garage renovation runs $32,800–$66,000 mid-range. San Jose is the highest-value market in the US for garage-to-ADU conversions — Silicon Valley's median home price exceeds $1.4 million and rental vacancy rates are below 2%, making a garage ADU one of the most financially rewarding home investments anywhere in the country. A fully permitted garage ADU in San Jose can generate $2,500–$4,500/month in rental income and add $300,000–$600,000 in property value.
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Frequently Asked Questions
A garage renovation in San Jose costs $82–$165 per square foot at standard quality. A 400 sq ft San Jose garage renovation runs $32,800–$66,000 mid-range. A full garage-to-ADU conversion with kitchen, bathroom, and all permits typically costs $100,000–$220,000 in San Jose — but adds $300,000–$600,000 in property value and generates $2,500–$4,500/month in rental income.