Oceanside
Detached ADUs
Independent living units up to 1,200 sq. ft.
Attached ADUs
offering up to 1,200 sq. ft. with direct connection
Conversion ADUs
Conversion ADUs: Transform Existing Spaces
JADUs
Affordable 500 sq. ft. units within existing homes.
Key Requirements of
Detached ADUs
Maximum Size: Up to 1,200 sq. ft.
Height
Standard: 16 feet.
Special Allowance: 18–20 feet for ADUs near transit stops or with matching roof pitch to the main residence.
Setbacks:
Front Yard: Follow local zoning requirements.
Side and Rear Yards: Minimum 4 feet.
Building Separation:
Minimum 6 feet from the primary home.
Minimum 10 feet in coastal zones.
Parking:
Rules: Flexible parking requirements based on exemptions.
Exemptions:
Within 1⁄2 mile of public transit.
Converted from an existing garage or structure.
Adjacent to a car-share facility.
Key Requirements of
Attached ADUs
Maximum Size: Up to 1,200 sq. ft.
Height: Matches the primary residence’s height.
Setbacks:
Front Yard: Follow zoning regulations.
Side and Rear Yards: Minimum 4 feet.
Parking:
Rules: Parking exemptions apply for transit-adjacent or converted ADUs.
Key Requirements of
Conversion ADUs
Maximum Size: Based on the size of the existing structure.
Height: Matches the existing structure’s height.
Setbacks:
No new setbacks required for conversions.
Parking:
Rules: No replacement parking required for converted garages.
Exemptions: Parking is waived near public transit or car-share facilities.
Key Requirements of JADUs
Maximum Size: 500 sq. ft.
Height: Matches the primary residence’s height.
Setbacks:
Not applicable for conversions within the existing home.
Parking:
Rules: No parking required for JADUs.
Exemptions: Garage conversions for JADUs do not require replacement parking.
Oceanside
Additional Requirements in Oceanside
How large can a detached ADU be in Oceanside?
Answer: Detached ADUs can be up to 1,200 sq. ft.
What’s the size limit for attached ADUs?
Answer: Attached ADUs can be up to 50% of the main residence’s size, with
a maximum of 1,200 sq. ft.
Are two-story ADUs allowed?
Answer: Yes, two-story ADUs are permitted but must follow zoning and
coastal regulations..
What are the setback requirements?
Answer: Side and rear setbacks are a minimum of 4 feet, with 10-foot
separations required in coastal zones.
Do I need to provide parking for my ADU?
Answer: No, parking is waived for ADUs within 1⁄2 mile of public transit or for
converted structures.
What utilities are required for ADUs?
Answer: ADUs can share utilities with the main residence, though detached
ADUs may require separate connections.
Can I convert my garage into an ADU?
Answer: Yes, garage conversions are allowed, and replacement parking is
not required.
How tall can my ADU be?
Answer: ADUs can be up to 16 feet, with exceptions for 18–20 feet near
transit stops or to match the roof pitch of the primary home.
Do I need a Coastal Development Permit?
Answer: Yes, ADUs in coastal zones require a Coastal Development Permit
to ensure environmental compliance.
Can I rent out my ADU?
Answer: Yes, ADUs can be rented long-term (31+ days), but short-term
vacation rentals are prohibited.
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