ADU Building in San Jose, CA
An Accessory Dwelling Unit (ADU) is one of the smartest investments a San Jose homeowner can make. San Jose ADU & Remodeling specializes in designing and building high-quality ADUs that generate rental income, house family members, or simply increase your property value.
California's ADU-friendly laws have made it easier than ever to add a secondary unit to your property. Our team handles everything from design and ADU construction to permitting and final inspection.
Detached ADUs
Standalone structures in your backyard — the most popular and versatile ADU type.
Attached ADUs
Units built as additions to your existing home, sharing at least one wall.
Garage Conversions
Transform an underused garage into a fully permitted living space.
Junior ADUs (JADUs)
Up to 500 sq ft units carved out of your existing home's footprint.
California ADU Laws & Regulations
California has aggressively expanded ADU rights since 2020. Under AB 68 and subsequent legislation , most single-family and multi-family properties can add at least one ADU. The City of San Jose Building Department has streamlined ADU permitting to comply with state law.
Key regulations include: minimum 800 sq ft allowed by right, reduced or waived parking requirements, and impact fee exemptions for ADUs under 750 sq ft.
See our FAQ: Do I Need a Permit to Build an ADU in San Jose?
ADU Benefits
- Rental income potential of $2,000–$3,500/month in the Bay Area
- Housing for aging parents or adult children
- Increased property value (often 20–30% ROI)
- Home office or studio space
- Room addition alternative for more privacy
How Much Does an ADU Cost?
ADU costs in San Jose typically range from $150,000 to $350,000 depending on size, design complexity, site conditions, and finishes. Visit our FAQ on ADU costs in San Jose for a detailed breakdown.
ADU vs. Home Addition
Not sure whether an ADU or a home addition is right for you? Read our guide: Home Addition vs ADU: Which Is Right for You?