Sunnyvale ADU Regulation Guide

A guide to learn more about ADU regulation and zoning in Sunnyvale, CA. We are here to help you with information and knowledge for permitting an ADU in Sunnyvale.

Sunnyvale is the 7th most populous city in the San Francisco Bay Area and one of the major cities comprising Silicon Valley. The city has embraced ADU-friendly policies to help address its housing needs.

Sunnyvale allows detached ADUs up to 1,200 square feet on single-family lots. Attached ADUs are permitted up to 50% of the existing living area or 1,200 sq ft, whichever is less.

No additional parking is required for ADUs in Sunnyvale, and impact fees have been waived for units under 750 square feet.

The permitting process typically takes 60–90 days. ADORE Homes has extensive experience navigating Sunnyvale's specific requirements and can help streamline the process for you.