Accessory dwelling unit permit cost — Irvine, CA

Last updated: September 24, 2026

What affects the price

Building an ADU is a major project, and the final bill depends on a few key things. Site prep is a big factor; if your land is sloped or needs extensive utility connections, costs go up. The materials you choose—from siding to kitchen finishes—also change the math significantly. Whether you’re building a detached unit or converting an existing garage shifts the permit requirements and structural work needed. We provide exact pricing confirmed free on the call.

Frequently asked in Irvine

Also serving nearby: Santa Ana · Costa Mesa · Mission Viejo · Orange · Garden Grove

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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, Turtle Rock, Woodbridge, Northwood, Cul-de-sac neighborhoods, Park Place — and every surrounding area.