Building an ADU in Irvine, CA
Site planning, permit coordination and construction for Irvine ADUs, with the city and property-specific checks handled up front.
Irvine ADU key facts
| City application | Irvine requires a completed Residential ADU application and ADU Verification Form, submitted through the IrvineReady! portal |
| Plan package | Building plans, calculations, construction documents, a site-plan checklist and the city’s supporting forms |
| Garage conversion parking | California Government Code §66314(d)(11) says replacement off-street spaces cannot be required when parking is demolished with or converted to an ADU |
| Property-specific review | Confirm utilities, easements, site constraints and any applicable private covenants before design is finalized |
An Irvine ADU starts with two separate questions: what current state and city rules allow, and what the individual property can support. The city publishes a defined online submittal path, but the correct design still depends on the lot, existing structures, utility routes, easements and any private covenants that actually apply to the address. We resolve those items before a permit set is treated as complete.
What’s different about building in Irvine
Irvine requires a completed Residential Accessory Dwelling Unit application and ADU Verification Form. The published submittal list also calls for building plans, calculations and construction documents, a development-standards checklist for the site plan, affidavits and other supporting forms. Applications go through IrvineReady!, and the city says staff first reviews the package for completeness before fees are paid and formal review proceeds. Our design-build scope covers the site verification, drawing coordination, permit package, correction responses, construction and inspections.
Garage-conversion parking is governed by current California law. Government Code §66314(d)(11) provides that when a garage, carport, covered parking structure or uncovered parking space is demolished with an ADU or converted to an ADU, the local agency may not require those off-street spaces to be replaced. A separate parking space for the ADU may still depend on the project and statutory exemptions, so we document the exact site conditions instead of applying a blanket rule.
If the property is subject to recorded covenants or an association, review the current documents early. That private review does not replace Irvine’s permit process or the protections in California ADU law, and it should not be assumed to apply to every Irvine property. The practical next step is an address-specific feasibility review that checks the city path, the lot and any documents that actually govern the property.
What an ADU costs in Irvine
Irvine ADU cost depends on the unit type and size, existing structure, utility routes, site access, finish level and any property-specific work discovered during feasibility. Use our live ADU cost calculator for a planning starting point, then request a site review before treating any figure as a construction quote.
Frequently asked questions
Do I need HOA approval to build an ADU in Irvine?
How does Irvine ADU plan review start?
Do I have to replace parking if I convert my garage?
What determines the cost of an Irvine ADU?
Useful links for Irvine homeowners
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