HomeGarage Conversion to ADU in Fountain Valley, CA
Garage Conversion to ADU in Fountain Valley
Essential Design Innovator is a licensed California general contractor with our office in nearby Garden Grove, serving Fountain Valley and all of Orange County. We turn existing garages into full ADUs, handling plans, city permits, construction and final inspection with one team the whole way. We work with homeowners in English and Tiếng Việt.
- Licensed CA Contractor
- Office in Garden Grove, serving Fountain Valley
- Plans → permits → final inspection
- English & Tiếng Việt
What a garage conversion ADU is
An ADU (accessory dwelling unit) is a second, separate home on your property. A garage conversion turns the structure you already have into that home, with its own kitchen and bathroom. Families use them for parents, grown children, guests or rental income.
We also build detached ADUs, attached ADUs and JADUs (junior ADUs inside your home). If your garage isn’t the best fit, we’ll tell you on the site visit and go over the other options.
How it works
- Free consultation and site visit — We look at your garage and lot and talk through what you want.
- Design and plans — We prepare the plans for the conversion and walk you through them before anything is submitted.
- City permits — We submit to the City of Fountain Valley through its online Permit Center (City of Fountain Valley – Permit Center) and follow the review through.
- Construction — Our team converts your garage and keeps you updated along the way.
- Final inspection — The city does its final inspection, and your new unit is ready to live in.
Our Work
Permits in Fountain Valley
A garage conversion ADU in Fountain Valley needs a building permit and has to meet the California Building Code.
Source: City of Fountain Valley – ADU Development Standards (PDF)
The city takes applications online through its Permit Center. Plans are uploaded as PDF files, and a full package can include structural, mechanical, electrical and plumbing sheets, structural calculations, Title 24 energy forms and, when they apply, soils reports or HOA approval. We prepare the package and file it for you.
Source: City of Fountain Valley – Permit Center
Good news for garage conversions: under the city’s ADU standards, you don’t have to replace the parking spaces you lose when your garage becomes an ADU. We confirm how this applies to your lot on the site visit.
Source: City of Fountain Valley – ADU Development Standards (PDF)
Why homeowners work with EDI
- Licensed: California general contractor.
- Local: Our office is in Garden Grove, a short drive from Fountain Valley.
- One team: Plans, permits, construction and final inspection, without juggling different companies.
- English and Tiếng Việt: Talk through your project in the language you’re most comfortable with.
Ready to talk about your garage conversion?
Call (949) 214-4131 for a free estimate. We’ll come look at your garage and tell you what’s possible.
Get My Free Estimate Call (949) 214-4131Frequently asked questions
Can I convert my garage into an ADU in Fountain Valley?
Many homeowners can, but it depends on your garage and lot. We check on a free site visit and explain your options.
Do I need a permit to convert my garage into an ADU?
Yes. The city requires a building permit, and the ADU must meet the California Building Code. Source: City of Fountain Valley – ADU Development Standards (PDF)
Do I have to replace the parking I lose?
No. Under the city’s ADU standards, garage parking spaces lost to an ADU conversion don’t have to be replaced. Source: City of Fountain Valley – ADU Development Standards (PDF)
How many ADUs can I have on a single-family lot?
On a lot with one single-family home, the city’s standards allow that home plus one ADU (attached or detached) and one junior ADU. Source: City of Fountain Valley – ADU Development Standards (PDF)
Does the ADU need its own kitchen and bathroom?
Yes. The city’s standards require the ADU to have its own kitchen and bathroom. Source: City of Fountain Valley – ADU Development Standards (PDF)
How do I apply for the permit?
Online through the Fountain Valley Permit Center: make an account, fill out the application and upload your plans as PDFs. We do this for you. Source: City of Fountain Valley – Permit Center
Do you speak Vietnamese?
Yes. Our team works with homeowners in both English and Tiếng Việt.
How much does a garage conversion cost?
Every project is different, so we give you a written estimate after a free site visit. Call (949) 214-4131 to set one up.