Accessory dwelling unit builders — 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.
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Frequently asked in Irvine
What is the estimated cost to build an accessory dwelling unit in Irvine?
Where can I find ADU near me in Irvine?
What defines adequate ADU housing in Irvine?
What are the benefits of a modular accessory dwelling unit in Irvine?
What factors influence the cost of an accessory dwelling unit permit in Irvine?
What are the typical financing options for an accessory dwelling unit in Irvine?
Who are reliable accessory dwelling unit builders 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: University Park, Woodbridge, Turtle Rock, Shady Canyon, Orchard Hills — and every surrounding area.
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