Trusted Los Angeles ADU Builders
ADU BuilderIn Cerritos, CA andLos Angeles County
NewGen ADU Builders is a Cerritos ADU builder serving Los Angeles County and Orange County. Licensed, insured and bonded, with a 1-year workmanship warranty, honest pricing and transparent timelines.
- 1-Year
- Workmanship Warranty
- 3–6 Mo
- Typical Build Timeline
- 30 Mi
- Service Radius
01 — About
More SpaceIncreased ValueA Brighter Future
NewGen ADU Builders is a family-owned ADU construction company based in Cerritos, California. We work with homeowners, investors, and multifamily property owners within roughly 30 miles of our home base, across Los Angeles and Orange County.
We do one thing: accessory dwelling units. That focus means we know the difference between a garage conversion that adds value and one that adds headaches. We price honestly, communicate transparently, and stand behind our work with a 1-year workmanship warranty.
Licensed Contractor
Fully Insured & Bonded
1-Year Workmanship Warranty
Family Owned & Operated
ADU Specialists
Serving Los Angeles & Orange County
02 — Services
Five Ways to Add a Home
Every project we take on is an ADU, whether it starts as a garage, a storage room, or an empty corner of your lot.
- 01
Garage Conversion
Turn an underused garage into a fully finished living space with its own kitchen, bath, and entrance. Garage conversions are often the fastest and most cost-effective route to an ADU because the structure already exists. We handle the design, build, and finish work.
Learn More - 02
Storage Room Conversion
Storage rooms, workshops, and other enclosed spaces can become rentable or family-ready living units. We assess the existing structure, plan the layout, and convert it into a complete ADU that feels like it was always meant to be a home.
Learn More - 03
New Ground-Up ADU Construction
When no existing structure fits, we build from the ground up. New construction gives you full control of the footprint, layout, and finishes. It is the right path for homeowners and investors who want a purpose-built unit designed for tomorrow.
Learn More - 04
Detached ADU
A standalone unit in the backyard offers the most privacy for tenants, aging parents, or adult children. We design detached ADUs that fit the lot, respect the main home, and maximize usable square footage within the budget you set.
Learn More - 05
Attached ADU
An attached ADU shares a wall with your existing home, which can lower construction costs and keep the footprint compact. We plan the connection carefully so both spaces stay private, functional, and comfortable.
Learn More
03 — Our Work
ADUs Done Right, Start To Finish
04 — Why NewGen
Why ChooseNewGen ADU Builders
01
Licensed, Insured & Bonded
We carry the licensing, insurance, and bonding that protect you and your property throughout the build. Documentation is available on request before any work begins.
02
1-Year Workmanship Warranty
Every ADU we build comes with a 1-year workmanship warranty. If something we built needs attention in that first year, we come back and make it right.
03
Honest, Transparent Pricing
Most of our projects fall between $120,000 and $340,000, and we tell you that up front. No vague quotes, no surprise change orders you did not see coming.
04
ADUs Are All We Do
We are not a general remodeler that also does ADUs. Garage conversions, storage conversions, attached and detached units are our entire business, so the details get the attention they deserve.
05
Family Owned, Committed to You
NewGen ADU Builders is a family-owned company based in Cerritos. When you call, you reach the people responsible for your project, not a call center.
05 — Process
How It Works
- 01
Consult
Reach out by text, call, or the contact form for your free ADU property and investment analysis. We review your property's site conditions, access, and utilities, then walk through your goals, budget, and preliminary feasibility.
- 02
Design
We develop the concept — size, layout, and finish level — and coordinate architectural and engineering work based on the final scope, then deliver a written estimate you approve before we move to permitting.
- 03
Permit
We submit for plan check and coordinate every permit requirement with the applicable jurisdiction so your project is fully approved before construction starts.
- 04
Build
From foundation and framing through MEP and finishes, we manage the defined scope, selections, and schedule, with inspections at every stage. Construction typically runs 3 to 6 months.
- 05
Turnover
Final inspection, punch-list completion, and a complete handoff of your finished ADU, backed by our 1-year workmanship warranty.
06 — Get Started
Ready to Add an ADUto Your Property?
Reach out today and we will schedule a short intake call, then set up an on-site visit to walk the project with you and provide a clear estimate.
- Free estimates after an on-site visit
- Licensed, insured and bonded
- 1-year workmanship warranty
- Text us at (562) 308-6040, Monday to Friday, 8am to 6pm
07 — FAQ
Common Questions
How much does an ADU cost?
Most of our ADU projects fall between $120,000 and $340,000 depending on the type of unit, size, and finishes. Garage and storage room conversions usually land at the lower end because the structure already exists. Ground-up detached units sit at the higher end. We give you a written estimate after the on-site visit.
How long does it take to build an ADU?
Construction typically takes 3 to 6 months once the plan is approved. Conversions tend to move faster than new construction. We give you a realistic timeline before work starts and keep you updated as the build progresses.
Are you licensed and insured?
Yes. NewGen ADU Builders is a licensed contractor and is fully insured and bonded. We can provide documentation before any work begins.
What areas do you serve?
We are based in Cerritos and serve properties within about 30 miles across Los Angeles County and Orange County. If you are near the edge of that range, reach out and we will let you know if we can help.
What happens after I contact you?
We start with a short intake interview by text or phone to learn about your property and goals. Then we schedule an on-site visit, walk the project with you, and follow up with a written estimate.
Do you work with investors and multifamily property owners?
Yes. We build ADUs for homeowners, investors, and owners of multifamily properties. Whether the unit is for family, rental income, or added property value, the process is the same: honest pricing and transparent communication from start to finish.
What should I compare when I'm getting bids from other ADU builders?
Before you compare bids, compare scope. Ask every builder to spell out, in writing, who is responsible for design and engineering, utility and electrical-service work, and foundation and structural scope; what cabinet, counter, flooring, and tile allowances are included; who handles permit and inspection responsibilities and site concrete, drainage, and exterior work; what the change-order process and exclusions are; and what your completion, punch-list, and warranty responsibilities look like. We put all of it in writing before you sign.
08 — Service Area
Serving Cerritosand Surrounding Areas
NewGen ADU Builders is based in Cerritos and serves properties within roughly 30 miles across Los Angeles County and Orange County. If your city is not listed, reach out and we will confirm coverage.
Serving Cerritos, Los Angeles County, and Orange County. Get your free ADU estimate today.