- Orange County
- Licensed, Insured & Bonded
- 1-Year Workmanship Warranty
ADU Constructionin Orange County, CA
NewGen ADU Builders builds accessory dwelling units for homeowners and investors across Orange County, from garage conversions to new detached units. Our Cerritos home base sits on the Los Angeles and Orange County line, so north and central Orange County are well within our 30-mile range. Every project is licensed, insured and bonded, and backed by a 1-year workmanship warranty.
- 1-Year
- Workmanship Warranty
- 3–6
- Month Build Timelines
- Minutes
- from the County Line
01 — Services
What We Build in Orange County
Every ADU service we offer is available across Orange County within about 30 miles of Cerritos. From a single-family home in a North Orange County neighborhood to a multifamily property with room for a new unit, we design and build the ADU to fit the lot and the budget.
- 01
Garage Conversion
Turn an existing garage into a finished living unit with its own kitchen, bath, and entrance. A popular path for Orange County homeowners adding space for family.
Learn More - 02
Storage Room Conversion
Convert a workshop, storage building, or similar structure into a complete ADU after an honest on-site assessment.
Learn More - 03
New Ground-Up ADU Construction
Build a new unit from the foundation up when no existing structure fits or you want a specific layout.
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Detached ADU
A standalone backyard home offering the most privacy for tenants or family.
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Attached ADU
A new unit that shares a wall with your home, a strong fit for lots without room for a separate structure.
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02 — Process
How It Works in Orange County
- 01
Short Intake Interview
Text, call, or send the form. We ask about your property, your goals, and your budget so we arrive prepared.
- 02
On-Site Visit
We come to you anywhere in our Orange County range, walk the property, and talk through which type of ADU fits your lot and budget.
- 03
Design & Written Estimate
We turn the visit into a plan and a written estimate showing exactly what is included. You approve before work starts.
- 04
Build & Handoff
Construction runs 3 to 6 months. We keep you updated, walk the finished unit with you, and back it with a 1-year workmanship warranty.
03 — Why Choose Us
Why Orange CountyHomeowners Choose Us
Right Across the County Line
Cerritos borders Orange County, so north and central OC properties are a short drive for us. Site visits are easy to schedule and we are close by during the build.
Licensed, Insured & Bonded
Your property is protected throughout the build, and documentation is available on request.
Honest, Transparent Pricing
Most projects fall between $150,000 and $200,000, and we tell you where yours lands before you commit.
1-Year Workmanship Warranty
If anything we built needs attention in the first year, we come back and fix it.
ADUs Are All We Do
Garage conversions, storage conversions, and new attached and detached units are our entire business.
04 — Get Started
Ready to Start Your ADUin Orange County?
Reach out and we will schedule a short intake call, then come to your property anywhere in our Orange County range for a free on-site visit and written estimate.
- Free on-site estimates across Orange County
- Licensed, insured and bonded
- 1-year workmanship warranty
- Text us at (562) 308-6040
05 — FAQ
Common Questions from OrangeCounty Homeowners
Do you serve all of Orange County?
We serve properties within about 30 miles of Cerritos, which covers north and central Orange County well. South Orange County may fall outside our range; reach out and we will tell you honestly.
How far do you travel for a site visit in Orange County?
Anywhere within our 30-mile range from Cerritos. The intake call and site visit are free and carry no obligation.
How much does an ADU cost in Orange County?
Our projects run between $150,000 and $200,000. Conversions sit at the lower end and new detached construction at the upper end. You get a written estimate after the on-site visit.
How do I get started if I am in Orange County?
Text or call (562) 308-6040 or send the form. We set up a short intake call, then schedule your on-site visit.
06 — Service Area
Serving Orange County andSurrounding Areas
Orange County sits just across the line from our Cerritos headquarters and is a core part of our service range, alongside Los Angeles County. Near the edge of our range? Text us and we will confirm.
Orange County
Based in Cerritos and proud to serve Orange County. Get your free ADU estimate today.