Mission Viejo's larger-lot communities — including Nellie Gail Ranch and Moulton Ranch — have backyard space well-suited to a detached ADU, while homes throughout the rest of the city are often better candidates for a garage conversion or JADU. ProHome handles detached ADUs, garage conversions, attached ADUs, and JADUs from initial design through permitting and construction, including any HOA approvals your community requires.
Mission Viejo covers a wide range of lot sizes and HOA structures — from the larger equestrian-zoned lots in Nellie Gail Ranch to the tighter-knit communities of Moulton Ranch and the rest of the city. We start every ADU project by reviewing your lot's size, setbacks, and any HOA design guidelines so the project we design is one the city — and your community — will actually approve.
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. A strong fit for the larger lots common in Nellie Gail Ranch and Moulton Ranch.
Converting an attached or detached garage into a livable ADU — including new insulation, plumbing, electrical, and egress. A practical option for Mission Viejo homes on smaller, more tightly-built lots.
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. A lower-cost path to a legal second living unit, with fewer site-plan constraints.
Architectural plans, structural engineering, and submission through the City of Mission Viejo'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.
Mission Viejo homeowners have plenty of contractor options. Here's what consistently sets us apart.
Our rating reflects clear scopes, honest pricing, and follow-through. Mission Viejo 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 the City of Mission Viejo, including structural, electrical, plumbing, and utility approvals, and coordinate every inspection — plus HOA submissions where required.
Based in nearby Lake Forest, we know Mission Viejo's communities — from Nellie Gail Ranch to Moulton Ranch — and the lot conditions and HOA processes that come with each.
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 Mission Viejo homeowners typically ask before starting an ADU project.
ProHome handles every trade in-house.
We serve all of Orange County.
Call us today or request a free on-site estimate. Detailed scope, transparent pricing, no pressure.