Community Development Department, (650) 616-7074
For permitting procedure questions, reach out to building@sanbruno.ca.gov
For development standards, reach out to planning@sanbruno.ca.gov
Standards | Details |
|---|---|
Zones allowed | ADUs are permitted in any district where residential uses are permitted |
Lot Restrictions | Floor area ratio (FAR), lot coverage for underlying zone |
Minimum Lot Size | 0 |
Min/Max ADU Size | Min: 150 sf – size required by Health Code, section 17958.1 |
ADU Building Height |
|
Setbacks | Rear and side: 4 feet |
Parking Requirements | JADUs: No parking required
On-street parking permits are required but not offered to ADU occupant |
Owner Occupancy | JADU: Required, ADU: not required for ADUs built recently (2020-2024) |
Sample fees from recent permits | ADU 1(426 sf, internal conversion): $2,825 No impact fees for ADUs/JADUs |
Other requirements | Only one ADU per property is allowed for single family lots. No drainage or topographic maps required. ADUs must comply with all requirements of the underlying zoning district. No short term rentals. Aircraft Noise Insulation requirement: ADUs in 65+ CNEL zones near SFO must meet Aircraft Noise Insulation Program standards. |
Process | Apply for a building permit. Deed restriction required prior to issuing building permit. Making an appointment to meet with a planner in the initial stages of the project can help avoid challenges and is highly recommended. |
Exceptions | ADUs under 800 square feet are exempt from FAR, impervious surface, lot size, and lot coverage requirements. |