Quick Answer: No — most ADUs in San Jose do not require additional parking under California state ADU law. California AB 2097 (effective January 1, 2023) prohibits local governments from requiring parking for any ADU located within half a mile of a public transit stop. San Jose is dense with VTA bus stops, so virtually every residential parcel in San Jose qualifies for the transit exemption. Additionally, when a garage is converted to an ADU, the state law prohibits requiring replacement parking spaces for the converted garage. The only situation where San Jose may require ADU parking is for a new detached ADU on a parcel that is more than half a mile from transit — which is unusual in urban San Jose.
ADU Parking Requirements in San Jose 2025 — Complete Guide
Helpful Resources:
| ADU Type | Parking Requirement | Exception / Notes |
|---|---|---|
| Any ADU within 1/2 mile of public transit | No parking required (AB 2097) | Most San Jose parcels qualify |
| Garage conversion ADU (eliminates existing parking) | No replacement parking required | State law prohibits requiring replacement |
| Junior ADU (JADU within existing home) | No parking required | All JADUs are exempt from additional parking |
| New detached ADU more than 1/2 mile from transit | Possibly 1 space required | Check San Jose zoning for specific parcel |
| ADU on parcel where all existing parking is retained | No additional parking required | Standard condition |
Practical Parking Considerations for San Jose ADUs
While the law doesn’t require ADU parking, practical considerations matter for your tenant and neighborhood: (1) If you’re converting your garage, your main house loses covered parking — evaluate if your driveway is adequate for the number of vehicles; (2) ADU tenants will have vehicles; make sure there is adequate on-street parking or you add a parking pad in the remaining driveway space; (3) If the ADU is for family members (in-law suite), consider whether your property can absorb an additional vehicle without conflict. None of these are code requirements, but practical planning avoids neighbor and tenant friction.
Quartz Construction designs ADUs that maximize usable living space while thoughtfully addressing site logistics like parking and utility access. Learn about ADU construction in San Jose. CSLB #1003436 | Call (650) 749-7436.
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Phone: (650) 749-7436
Address: 1777 Hamilton Ave #1080, San Jose, CA 95125
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