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ADU design-build · Irvine

ADUs in Irvine

Planned villages, homeowners associations and high rents: in Irvine, a well-designed ADU must satisfy the city, the HOA and the neighbors.

What applies to your lot

Building an ADU in Irvine

Who approves your ADU

City of Irvine: every ADU or JADU needs a Residential ADU (RADU) application and an ADU Verification Form. State law applies everywhere: a decision within 60 days of a complete application, no public hearing, and at least 800 sq ft with 4 ft side and rear setbacks.

HOAs

Most Irvine homes are in an HOA. State law prevents an HOA from banning an ADU, but it can apply reasonable design rules. We prepare both submittals together.

ADU Standard Plan Program

Irvine has a standard plan program for pre-approved ADU designs. We tell you whether one fits your lot.

Utility connections

Water and sewer connections go through the Irvine Ranch Water District, with its own fees. We include them in the estimate.

California law, everywhere

The rules every city must respect

800 sq ft

Every city must allow at least an 800 sq ft detached ADU with 4 ft setbacks.

4 ft

Maximum side and rear setback for a new detached ADU.

750 sq ft

No impact fees up to this size.

60 days

To approve or deny a complete application, without a hearing.

Read the full guide to ADU rules →

Ideas for your lot

Plans that suit Irvine lots

1 bedroom

One-bedroom with front porch

672 sq ft · 24' × 28'

1 bed1 bath

2 bedrooms

Two bedrooms, two baths

884 sq ft · 26' × 34'

2 beds2 baths

L & U shapes

U-shape around a courtyard

640 sq ft · U · 30' × 26'

1 + den1 bath

See all 51 floor plans →

FAQ

ADU questions in Irvine

Who approves an ADU in Irvine?

The City of Irvine. Your HOA may also review the design, in parallel.

Can my HOA say no?

It cannot ban an ADU outright, but it can set reasonable rules on design. We work with its guidelines from the start.

Do you come to my property?

Yes. The visit is free: we look at the lot, the access and the utilities, then give you a realistic estimate.

Nearby areasSanta AnaHuntington BeachAnaheim

Free feasibility call

Book a free 15-minute feasibility call

A project lead reviews your address, tells you what your lot can hold and gives you a first look at your financing eligibility.

What you get

  • Free, with no obligation
  • A clear answer on what your lot can hold
  • A first look at financing eligibility, by phone or at your property
  • A site visit only if it makes sense

Prefer to talk now? (424) 448-4895

Email: [email protected]

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Service areas

Serving homeowners across Los Angeles

Los Angeles, the South Bay and Orange County, within about 40 miles of Paramount. Farther on request.

Service areas

ADU rules, city by city

Permits, fire and coastal zones, pre-approved plans: see what applies in the 36 cities we serve.

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