WHAT TO KNOW FIRST
The answer changes with the project type and the facts at the property. These answers direct homeowners to the relevant service and current primary sources; they do not replace parcel-specific professional or City review.
Services and first steps
What types of ADUs do you build in Irvine?
We focus on site-built detached backyard ADUs, garage conversions, attached ADUs, and JADUs.
How do I start?
Identify the property, intended use, and preferred project type. Review the estimate preparation checklist, then call (949) 763-5237.
Can I request an estimate online?
No online estimate submission is active. The private planner saves only in your browser and does not send a lead.
Costs and permits
How much does an Irvine ADU cost?
Cost depends on defined work, site conditions, utilities, existing structures, finishes, professional services, fees, and exclusions. Use the Irvine ADU cost guide to compare complete scopes.
Who handles permits?
Responsibilities must be stated in the proposal. The permit guide explains Irvine’s public application path; it does not assign responsibility for your contract.
How long will the project take?
The sequence depends on investigation, design, review, utility coordination, procurement, construction, inspections, and changes. See the timeline and stages guide.
Property and ownership
Does a first call confirm that my property qualifies?
No. A call begins the discussion and cannot confirm eligibility, price, approval, or schedule. Use the property checklist.
Does an HOA decide whether the City issues a permit?
Association procedures and City review are separate. Review current governing documents and California protections with qualified advisers; neither process should be assumed from a general webpage.
Choosing a contractor
What should I compare in proposals?
Compare license and identity, drawing basis, scope, allowances, exclusions, site work, utility assumptions, responsibilities, schedule assumptions, changes, payment terms, and closeout. Use the Irvine contractor hiring guide.
Return to Irvine ADU Contractor or call the local team.
PRIMARY SOURCES
Public material used in the review
Links checked September 7, 2026.
Public guidance answers only part of the question. Field conditions and the written scope must also be checked.
FROM HERE
Keep working through the homeowner checklist.
PUT THE SITE FIRST
Show us what already exists at the home.
Let us know what is driving the project and which decisions feel uncertain. We can discuss a sensible order for resolving them.