Adu building — 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
ADU building covers the entire process of planning, permitting, and constructing a secondary home on your property. This involves drafting site plans, getting approval from your local planning department, and handling the structural work from foundation to roof. You need this service when you are ready to officially break ground on your project. Costs are driven by the complexity of the design, site preparation, and finish materials. Exact pricing confirmed free on the call.
Frequently asked in Irvine
What are the requirements for building an accessory dwelling unit in Irvine?
Can I get an affordable ADU built in Irvine?
What are the benefits of a backyard accessory dwelling unit in Irvine?
Is there an accessory dwelling unit in New Hampshire that is similar to what's allowed in Irvine?
What is the process for obtaining an accessory dwelling unit permit in Irvine?
Can I get financing for an accessory dwelling unit contractor in Irvine?
While we, as accessory dwelling unit contractors in Irvine, California, do not directly offer financing, we can provide the necessary documentation for your loan applications. Many homeowners finance their ADU projects through home equity loans, lines of credit, or construction loans. We work closely with lenders to supply detailed project scopes and cost estimates required for financing approval. We recommend consulting with financial institutions in the Irvine area to explore the best financing options for your ADU construction.
What are the typical accessory dwelling unit construction steps 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: Woodbridge, University Park, Northwood, Quail Hill, Oak Creek, Turtle Rock — and every surrounding area.
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