Accessory dwelling unit permit — Irvine, CA
Last updated: September 24, 2026
What affects the price
Building an ADU is a custom project, so costs vary based on your specific choices. Site conditions are the biggest factor; if your land requires significant grading, utility extensions, or foundation work, those expenses add up quickly. Choosing high-end finishes, custom cabinetry, or complex roof lines will also push the budget higher compared to a standard design. Prefabricated units often offer predictable costs, while custom site-built structures allow for more flexibility but can be harder to estimate upfront. Exact pricing confirmed free on the call.
About this service
An accessory dwelling unit permit is the mandatory approval required by your city to ensure your project meets local zoning and safety codes. You need this whenever you plan to add a secondary living space to your property. Factors affecting the cost include municipal filing fees and the level of engineering detail required for your plans. Exact pricing confirmed free on the call.
Frequently asked in Irvine
Are there accessory dwelling unit grants available in Irvine?
What ADU services are offered in Irvine?
What is the accessory dwelling unit permit cost in Irvine?
How do I get an ADU estimate in Irvine?
What is an ADU unit and how does it apply in Irvine?
What is the accessory dwelling unit rental market like in Irvine?
What is the cost to build an accessory dwelling unit in Irvine?
Also serving nearby: Santa Ana · Costa Mesa · Mission Viejo · Orange · Garden Grove
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Irvine — population 314,621; about 4,795 residents per square mile across 65.6 sq mi. ZIP codes covered include 92602, 92603, 92604, 92606, 92612, 92614, 92616, 92617.
Neighborhoods served in Irvine: Great Park Neighborhood, University Town Center, Shady Canyon, Woodbridge, Turtle Rock, Eastbluff — and every surrounding area.
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