ADU Rules: Bonsall vs Encinitas

Can I build an ADU in unincorporated San Diego County?

Yes. State law requires the County to allow ADUs on residential properties. Detached ADUs up to 1,200 sq ft are permitted with a building permit from County PDS.

What are the setback requirements for an ADU?

Both attached and detached ADUs must maintain at least 4-foot side and rear setbacks. Detached ADUs 16 feet tall or less may be at the property line. Front setbacks follow the underlying zone.

Does an ADU count toward lot coverage?

ADUs up to 800 sq ft are exempt from lot coverage requirements, meaning you can build one even if your lot is at the maximum allowed coverage.

Can I build an ADU in Encinitas?

Yes. California law requires all residential lots to allow at least one ADU. Encinitas must approve compliant applications ministerially within 60 days. Detached ADUs may be up to 1,200 square feet with 4-foot side and rear setbacks.

Do I need a Coastal Development Permit for an ADU in Encinitas?

Properties in the coastal zone may require a CDP in addition to the building permit. The city has adopted local coastal program amendments to address ADU permitting in the coastal zone. Contact Development Services to determine if your property is affected.

Does my ADU need to have parking?

No parking is required for ADUs within half a mile of public transit, or for converted existing structures, or if there is a car-share vehicle within a block. State law significantly limits parking requirements for ADUs.