New Ground-Up ADU Construction
Ground-Up ADU ConstructionIn Cerritos, CA
NewGen ADU Builders handles new ADU construction in Cerritos and across Los Angeles and Orange County, built from the ground up and backed by a 1-year workmanship warranty.
01 — What's Included
What's Included in a Ground-UpADU Build
Ground-up construction means we build a new, standalone or attached unit where nothing existed before. It is the right choice when there is no garage or storage structure to convert, when you want a specific layout, or when the goal is a purpose-built rental or family unit designed for the long term.
Site visit and lot evaluation
Floor plan and layout design
Foundation, framing, and roofing
Full kitchen and bathroom build-out
Plumbing, electrical, and HVAC coordination
Interior and exterior finishes
Final walkthrough and 1-year workmanship warranty
02 — Process
How Our Ground-Up ADU Process Works
- 01
Consult
Text, call, or send the form for your free ADU property and investment analysis. We review setbacks, access, and utility locations, then talk through your goals, budget, and preliminary feasibility.
- 02
Design
We develop the concept — size, layout, and finish level — for your ground-up ADU 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. Ground-up builds typically run toward the longer end of our 3 to 6 month range.
- 05
Turnover
Final inspection, punch-list completion, and a complete handoff of your finished ground-up ADU, backed by our 1-year workmanship warranty.
03 — Why Choose Us
Why Choose Usfor New ADUConstruction
Designed for Tomorrow
A ground-up ADU is a long-term asset. We design layouts that work for family today and rental income later, so the unit keeps its value as your needs change.
Honest Budget Conversations
New construction is the largest ADU investment, usually at the upper end of our $120,000 to $340,000 range. We tell you that at the start and keep the estimate transparent throughout.
Licensed, Insured & Bonded
A full build from the ground up carries more risk than a conversion. Our licensing, insurance, and bonding protect your property through every phase.
1-Year Workmanship Warranty
If anything we built needs attention in the first year, we come back and make it right.
ADUs Are All We Do
We are not a general builder. Every project is an accessory dwelling unit, so the design and construction decisions specific to ADUs get our full attention.
04 — Get Started
Ready to Build a New ADU onYour Property?
Reach out and we will schedule a short intake call, then visit your lot to walk the project with you and provide a clear written estimate.
- Free estimates after an on-site visit
- Licensed, insured and bonded
- 1-year workmanship warranty
- Text us at (562) 308-6040
05 — FAQ
Common Questions About New ADUConstruction
How much does it cost to build a new ADU?
Ground-up construction typically sits at the higher end of our $120,000 to $340,000 range because everything from the foundation up is new. Size, layout, and finishes drive the final number. Your written estimate after the site visit will show exactly where your project lands.
How long does it take to build an ADU from scratch?
Our builds run 3 to 6 months, and new construction usually falls toward the longer end. We give you a realistic timeline before work starts and keep you updated throughout.
Should I build new or convert an existing structure?
If you have a garage or storage room in good condition, a conversion is often faster and less expensive. If you want a specific layout, more square footage, or there is no existing structure, ground-up construction is the better path. We help you decide at the site visit.
Can I build an ADU on a multifamily property?
We work with owners of multifamily properties as well as single-family homeowners and investors. Reach out with the property details and we will walk through the options at the site visit.
What areas do you serve?
We build within about 30 miles of Cerritos across Los Angeles County and Orange County.
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.
06 — Service Area
New ADU Constructionin Cerritos and Beyond
We build new ADUs for homeowners and investors throughout Los Angeles County and Orange County, within roughly 30 miles of our Cerritos base. Near the edge of that range? Text us and we will confirm.
Cerritos, CA
Norwalk
Lakewood
Bellflower
Buena Park
Downey
Whittier
Fullerton
Long Beach
Garden Grove
Offering new ADU construction in Cerritos, Los Angeles County, and Orange County. Get your free estimate today.