ADU rules in Irvine, CA — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Irvine regulates accessory dwelling units under its Zoning Ordinance consistent with California Government Code Section 65852.2. ADUs are approved ministerially through a building permit on single-family lots, with detached units up to 1,200 square feet permitted by right.
The City of Irvine processes ADU and JADU applications per state statute using a Residential Accessory Dwelling Unit (RADU) application and ADU Verification Form. Detached ADUs up to 1,200 square feet are permitted on single-family lots with a maximum height of 16 feet and minimum 4-foot rear and side setbacks. Junior ADUs up to 500 square feet are allowed within existing primary residences. ADUs may be established through conversion of existing spaces such as garages or through new construction that is attached to or detached from the primary home. No replacement parking is required for garage conversions. Multi-family properties may add detached ADUs equal to 25% of existing units or at least two ADUs.
Building an ADU without a permit is subject to code enforcement action. Stop-work orders, fines, and required retroactive permitting may apply. Contact Code Enforcement at (949) 724-6326.
Irvine, CA
Leaf blowers in Irvine must comply with the construction/maintenance equipment hours: 7:00 AM-7:00 PM weekdays, 9:00 AM-6:00 PM Saturdays, and prohibited on ...
Irvine, CA
Outdoor music in Irvine is subject to IMC noise zone standards. Organized events with amplified outdoor music require city permits. Music must comply with th...
Irvine, CA
Amplified music in Irvine is regulated under IMC Title 6, Division 8, Chapter 2 (Noise). Sound must not exceed the exterior noise standards for the receiving...
Irvine, CA
Aircraft noise in Irvine is primarily from John Wayne Airport (SNA), regulated by federal FAA rules and the county's access and noise plan. The IMC noise ord...
Irvine, CA
Irvine regulates street parking under IMC Title 6, Division 3 including the 72-hour limit, street sweeping compliance, and red zone prohibitions per Section ...
Irvine, CA
Irvine restricts parking of commercial vehicles in residential areas under IMC Title 6, Division 3 and the Irvine Zoning Ordinance. Large commercial vehicles...
Side-by-side rule comparisons with other cities in Orange County.
See how other cities in Orange County handle adu rules.
See how Irvine's adu rules rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.