San Mateo County

Half Moon Bay ADU rules

Half Moon Bay 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 Half Moon Bay?

Half Moon Bayhas 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.

Half Moon Bay ADU rule guide

Half Moon Bay ADU size limits

Min: 150 sf, Max one bedroom or less: 850 square feet, Max two or more bedrooms: 1200 square feet

Half Moon Bay height and setbacks

Attached two story: 28 feet Attached one story: 20 feet Detached: 16 feet if within rear yard setback; otherwise 20 feet. Side and rear: 4 feet, Front: same as primary dwelling

Half Moon Bay 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 *Unless within parking area designated for coastal access Owner must live in the main dwelling or the ADU

How Half Moon Bay 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 » Half Moon Bay Local ADU Rules Half Moon Bay...

Local rule facts

Min/max ADU size

Min: 150 sf, Max one bedroom or less: 850 square feet, Max two or more bedrooms: 1200 square feet

Height

Attached two story: 28 feet Attached one story: 20 feet Detached: 16 feet if within rear yard setback; otherwise 20 feet.