Pre-Approved ADU Plans in Santa Ana, California

Up to one ADU and one JADU per lot developed with a single-family residence.

Source

ADU/JADU Development Standards - City of Santa Ana

Last checked

May 1, 2026

Notes

Not listed in source

Up to eight detached ADUs, not to exceed number of primary units, and up to 25% of existing units through conversion of non-habitable space.

Source

ADU/JADU Development Standards - City of Santa Ana

Last checked

May 1, 2026

Notes

Not listed in source

Up to 1,000 square feet.

Source

ADU/JADU Development Standards - City of Santa Ana

Last checked

May 1, 2026

Notes

Not listed in source

Up to 1,000 square feet or 50% of primary residence floor area, whichever is less; may exceed 50% to permit 800 square foot unit.

Source

ADU/JADU Development Standards - City of Santa Ana

Last checked

May 1, 2026

Notes

Not listed in source

Up to 500 square feet within existing or proposed single-family residence and/or attached garage.

Source

ADU/JADU Development Standards - City of Santa Ana

Last checked

May 1, 2026

Notes

Not listed in source

Four feet; no additional setback for existing building converted to ADU.

Source

ADU/JADU Development Standards - City of Santa Ana

Last checked

May 1, 2026

Notes

Not listed in source

20 feet or two stories.

Source

ADU/JADU Development Standards - City of Santa Ana

Last checked

May 1, 2026

Notes

Not listed in source

One parking space required for newly constructed ADUs unless within 1/2 mile of public transit, created within existing building, in historic district, not offered required on-street permit, on same block as car share, or studio unit.

Source

ADU/JADU Development Standards - City of Santa Ana

Last checked

May 1, 2026

Notes

Not listed in source

No parking required for a JADU.

Source

ADU/JADU Development Standards - City of Santa Ana

Last checked

May 1, 2026

Notes

Not listed in source

No owner occupancy requirements.

Source

ADU/JADU Development Standards - City of Santa Ana

Last checked

May 1, 2026

Notes

Not listed in source

Owner occupancy required in either the single-family residence or JADU; restrictive covenant recorded at building permit issuance.

Source

ADU/JADU Development Standards - City of Santa Ana

Last checked

May 1, 2026

Notes

Not listed in source

ADUs and JADUs may not be used as short-term vacation rentals; rentals of 30 days or more allowed.

Source

ADU/JADU Development Standards - City of Santa Ana

Last checked

May 1, 2026

Notes

Not listed in source

Separate address required for ADU and JADU.

Source

ADU/JADU Development Standards - City of Santa Ana

Last checked

May 1, 2026

Notes

Not listed in source

ADUs must have pedestrian access from the street.

Source

Accessory Dwelling Unit (ADU) FAQs and Helpful Links

Last checked

May 1, 2026

Notes

Not listed in source

No minimum lot size requirement if proposed unit complies with applicable standards.

Source

Accessory Dwelling Unit (ADU) FAQs and Helpful Links

Last checked

May 1, 2026

Notes

Not listed in source

Property owner agrees to construct in accordance with the preapproved plan set without modifications; modifications may require licensed professional revisions and additional permit review, inspection, or impact fees.

Source

Pre-Approved Accessory Dwelling Unit (ADU) Application and Affidavit

Last checked

May 1, 2026

Notes

Not listed in source

Projects using pre-approved plan sets must meet grading permit exemption requirements and submit completed grading permit exemption form.

Source

Pre-Approved ADU Plans - City of Santa Ana

Last checked

May 1, 2026

Notes

Not listed in source

Submittal checklist requires OCFA Residential Form and notes deferred fire sprinkler submittal may be permitted; contact Orange County Fire Authority.

Source

Pre-Approved Accessory Dwelling Unit (ADU) Submittal Checklist

Last checked

May 1, 2026

Notes

Not listed in source

ADUs must follow most recently adopted Title 24 Part 6 requirements; ADUs with floor area of 733 sq ft or less are exempt from PV system requirements.

Source

Pre-Approved Accessory Dwelling Unit (ADU) Submittal Checklist

Last checked

May 1, 2026

Notes

Not listed in source

Installation of new 4-inch sewer lateral may be required; verify with City Water Resources Division.

Source

Pre-Approved Accessory Dwelling Unit (ADU) Submittal Checklist

Last checked

May 1, 2026

Notes

Not listed in source

Recent title report within last six months required, including Assessor Parcel Map, Grant Deed, and legal description.

Source

Pre-Approved Accessory Dwelling Unit (ADU) Submittal Checklist

Last checked

May 1, 2026

Notes

Not listed in source

Application review, permit, and development impact fees may be applicable/apply; contact agencies/departments for current fees.

Source

ADU/JADU Development Standards - City of Santa Ana

Last checked

May 1, 2026

Notes

Not listed in source

No fee found on official Santa Ana plan download pages; plan ZIPs are downloadable from the official site.

Source

Pre-Approved ADU Plans - City of Santa Ana

Last checked

May 1, 2026

Notes

Amount stored as $0 because public download links are provided without listed charge; no separate purchase fee identified.