Adu 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.
Frequently asked in Irvine
What is the construction cost of an accessory dwelling unit in Irvine?
Can I get a permit for an accessory dwelling unit in Irvine?
Who are the best accessory dwelling unit builders in Irvine?
What does accessory dwelling unit mean in Irvine?
What are affordable accessory dwelling units in Irvine?
Can I get an ADU quote for my Irvine property?
What are the requirements for accessory dwelling unit permits?
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: Woodbridge, University Park, Northwood, Stonegate, Great Park Neighborhoods — and every surrounding area.
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