Millbrae ADU size limits
Min: 150 square feet, Max one bedroom or less: 850 square feet, two + bedrooms: 1000 square feet Maximum 50% of main home floor area. Max JADU: 500 square feet
San Mateo County
Millbrae ADU rules
Millbrae has an official local rule record in this scrape. Provider research is grouped at the San Mateo County level.
Direct answer
Can I build an ADU in Millbrae?
Millbraehas an official local ADU rule record in this directory. Start with the city's size, height, setback, parking, and owner occupancy standards below, then confirm lot-specific limits with the official source before hiring design or construction help.
Millbrae ADU rule guide
Millbrae height and setbacks
ADU: Attached – 25 feet; detached – 16 feet, JADU: same as the existing structure Attached: side and rear – 4 feet, front – determined by base zoning district Detached: side and rear – 4 feet, front – determined by base zoning district, 5 feet from primary residence
Millbrae parking and owner occupancy
JADUs: No parking required ADUs: One spot may be required (tandem allowed). No parking required if: ½ mile walking distance from public transit, in a historic district, or one block from a car-share vehicle on-street parking permits are required but not offered to ADU occupant JADU: Required, deed restricted, ADU: Not required
How Millbrae ADU permitting works
-at-a-Glance FAQs Floorplans Inspiration Glossary Guidebook + Exercises Pre-Designed Plans Process-at-a-Glance See the resources page Events About Contact Getting Started Learning the Rules Budgeting Design Permitting Construction Renting Getting Started Learning the Rules Budgeting Design Permitting Construction Renting Home » Local Rules » Millbrae Local ADU Rules Millbrae Last...
Local rule facts
Min/max ADU size
Min: 150 square feet, Max one bedroom or less: 850 square feet, two + bedrooms: 1000 square feet Maximum 50% of main home floor area. Max JADU: 500 square feet
Height
ADU: Attached – 25 feet; detached – 16 feet, JADU: same as the existing structure
Setbacks
Attached: side and rear – 4 feet, front – determined by base zoning district Detached: side and rear – 4 feet, front – determined by base zoning district, 5 feet from primary residence
Parking
JADUs: No parking required ADUs: One spot may be required (tandem allowed). No parking required if: ½ mile walking distance from public transit, in a historic district, or one block from a car-share vehicle on-street parking permits are required but not offered to ADU...
Owner occupancy
JADU: Required, deed restricted, ADU: Not required
Process
-at-a-Glance FAQs Floorplans Inspiration Glossary Guidebook + Exercises Pre-Designed Plans Process-at-a-Glance See the resources page Events About Contact Getting Started Learning the Rules Budgeting Design Permitting Construction Renting Getting Started Learning the...