Accessory dwelling units have become one of the most popular ways for Orange County homeowners to add living space, house family, or generate rental income — and California's streamlined ADU laws have made the process faster than a standard addition. ProHome handles detached ADUs, garage conversions, attached ADUs, and JADUs throughout Orange County, from initial design through city permitting and construction.
From larger-lot communities in South Orange County to tighter urban lots closer to the coast and inland cities, the right ADU approach depends heavily on your specific property — lot size, setbacks, existing structures, and any HOA guidelines all factor in. We start every project with a site assessment so the ADU we design is one your city will approve and your lot can actually support.
Full-scope ADU projects from design through final inspection. One licensed contractor managing architecture, permitting, and construction.
Standalone backyard units up to 1,200 sq ft, built to function as a complete home — bedroom, bathroom, kitchen, and living space. The right fit for properties with backyard space to spare.
Converting an attached or detached garage into a livable ADU — including new insulation, plumbing, electrical, and egress. Often the most practical option on tighter lots throughout Orange County.
An addition built onto the existing home with its own entrance, kitchen, and bathroom — sharing one or more walls with the main house. Often the most cost-effective way to add a self-contained living space.
Up to 500 sq ft, converted from existing space within the home's footprint — often a bedroom with an added kitchenette and separate entrance. The lowest-cost path to a legal second living unit.
Architectural plans, structural engineering, and submission through your city's ADU plan check process — plus HOA architectural review where applicable. California's streamlined ADU laws mean faster turnaround than a standard addition.
Grading, utility trenching, and new or upgraded electrical, water, and sewer connections for your ADU — coordinated with the main home's existing systems so everything works together once construction wraps.
Orange County homeowners have plenty of contractor options. Here's what consistently sets us apart.
Our rating reflects clear scopes, honest pricing, and follow-through. Homeowners who hire us know where their project is at all times — we reach out before they have to ask.
We manage the full ADU plan check and permitting process with your city, including structural, electrical, plumbing, and utility approvals, and coordinate every inspection — plus HOA submissions where required.
Based in Lake Forest, we've built ADUs across Orange County's cities and know how each jurisdiction's plan check process and design standards differ.
No chasing us down for a status update. You get a named point of contact and regular check-ins throughout your project. Calls returned the same day. That's not a promise on paper; it's how every job runs.
What Orange County homeowners typically ask before starting an ADU project.
ProHome handles every trade in-house.
City-specific ADU guides for Orange County.
Call us today or request a free on-site estimate. Detailed scope, transparent pricing, no pressure.