Santa Clara, CA Accessory Structures: ADU Rules (2026)
ADU rules in Santa Clara, CA, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.
Key Facts
- State framework
- Gov Code 65852.2
- Detached ADU
- Up to 1200 sq ft
- JADU
- Up to 500 sq ft inside home
- Review clock
- 60-day ministerial
- Sell separately
- AB 1033 if opted in
Summary
Santa Clara permits ADUs and JADUs under California Gov Code 65852.2. Ministerial approval applies to compliant designs with no owner-occupancy requirement and no discretionary review.
Accessory Dwelling Units (ADUs) and Junior Accessory Dwelling Units (JADUs) are an innovative and effective option for adding much needed housing in California. ADUs have been known by many names: granny flats, in-law units, backyard cottages, secondary units and more. HCD is the state’s leader on local ADU ordinances, which — while optional — have grown exponentially in number as more cities, counties, and homeowners become interested in ADUs as one solution to increasing the supply of affordable housing. As of March 25, 2024, with the Chaptering of Senate Bill (SB) 477 (Chapter 7, Statutes of 2024), the sections of Government Code relevant to State ADU and JADU Law have been re-numbered. preview
Full Breakdown
Santa Clara aligns its ADU ordinance with California Government Code 65852.2 as amended by AB 68, AB 881, SB 13, and later cleanups. Single-family lots may add one detached ADU up to 1,200 square feet and one Junior ADU up to 500 square feet inside the primary dwelling. Multifamily properties may add multiple ADUs under statewide floors. Ministerial review with a 60-day decision is mandatory, and owner-occupancy requirements are suspended through the current statutory window. ADUs have no minimum lot size, reduced setbacks of 4 feet side and rear, and no covered parking replacement when existing parking is converted. AB 1033 additionally allows cities that opt in to approve ADUs as separately conveyable condominium units; check Santa Clara's current code for local AB 1033 status.
Frequently Asked Questions
Do I need to live on site to rent out my ADU?
Can I build a 2-story detached ADU?
Sources & Official References
Other rules in Santa Clara
How Santa Clara compares: Easiest Cities to Build an ADU·California rules heatmap·Compare Santa Clara to another location·View the California accessory structures overview
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ADU Rules in Nearby Cities
How other cities in Santa Clara County handle adu rules.