ADU Certified ADU projectLicense Verified

ADU Certified

Serving Long Beach, Huntington Beach, Los Angeles County · Based in Long Beach, CA

Pricing on request — unlock ADU Certified's ADU pricing for your project

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About ADU Certified

ADU Certified is a CSLB-verified contractor listed in Los Angeles County with classification B.

7+ years building ADUs · CSLB 1041789 · B - General Building Contractor

ADU Certified ADU pricing

Pricing varies by unit type, size, finishes, and site conditions. Unlock ADU Certified's project pricing for your lot — free, no obligation.

Unit typeTypical sizePricing
Studio / JADU≤ 500 sq ftPricing locked — unlock to view
1-bedroom detached ADU600–750 sq ftPricing locked — unlock to view
2-bedroom detached ADU750–1,000 sq ftPricing locked — unlock to view
Garage conversion400–600 sq ftPricing locked — unlock to view
Attached ADU400–800 sq ftPricing locked — unlock to view

Pricing is unlocked per project

Share a few details and we'll send ADU Certified's pricing for your build.

Services ADU Certified offers

  • Detached ADUs
  • Attached ADUs
  • Garage Conversions
  • Junior ADUs (JADU)
  • Permitting

What ADU Certified handles

Design & permitting

In-house design and full permit handling.

  • Architectural design & 3D renderings
  • Structural & Title 24 energy plans
  • City plan-check submittal & corrections

Construction

Turnkey ground-up and conversion builds.

  • Foundation & framing
  • Detached, attached & garage-conversion ADUs
  • Electrical, plumbing & HVAC

Financing

Guidance and lender introductions.

  • Renovation / construction-loan guidance
  • HELOC & cash-out refinance referrals
  • ADU-specific (after-build-value) lenders

Project types

ADU formats this builder takes on.

  • Detached ADU
  • Attached ADU
  • Garage / ADU conversion

Warranty & support

What's covered after move-in.

  • Workmanship warranty
  • Manufacturer materials warranties
  • Dedicated project manager

Reviews of ADU Certified

5.07 reviews
Verified

Dimas was great. He was affordable. Our ADU looks so luxurious. All our friends and family love it. Dimas runs a clean jobsite. We are very pleased with how the ADU came out.

Garrett Stack0 found this helpful
Verified

Dimas was fantastic to work with! He was upfront about cost and timeline, including ways we could save money and what all our options were. He kept us updated every step of the way, coming by multiple times a week in evening after we had gotten home from work to fill us in on progress and next steps. He was incredibly patient with all of our last-minute changes and kept a positive attitude through it all! We could not be happier with the result, and have recommended Dimas to all of our friends and neighbors in the area!

Alexander Hreiz0 found this helpful
Verified

Hired this company from a referral from another contractor. I already had the plans done but he noticed that the plans were going to interfere with the SCE wires so I checked with SCE and sure enough, had I started construction, would have had to stop and rework everything. In the end he saved me tens of thousands of dollars. Gave me a written contract to sign and even after some upgrades, he still honored the original price with zero additional charges. He also told me the project would take about 6 months, which I did not believe because, as we all know, contractors are not the most honest people in the world (did you see the movie the Money Pit?) The project took 6 months and 2 weeks...I couldn't believe it. Everything came out amazing. Highly recommend ADU certified!!!

Gary King0 found this helpful
Verified

We had an excellent experience with ADU certified. Dimas was always involved and keeping us updated with the good and the bad. He kept to the budget. Would highly recommend.

Kenneth Lee0 found this helpful
Verified

My husband and I had a wonderful experience using ADU Certified to convert our garage into an ADU. Dimas was extremely accommodating, professional, friendly, and responded to our concerns immediately. We are very happy with the way the conversions turned out. The first tenants who saw the place told me not to show our place anymore to another renter as they were impressed too. We highly recommend them for your ADU build!

Donna Venosa0 found this helpful

Frequently asked questions about ADU Certified

What does ADU Certified offer?

ADU Certified is a full-service ADU builder serving Long Beach, CA, handling design, permitting, and turnkey construction for detached ADUs, attached ADUs, garage conversions, and junior ADUs (JADUs). ADU Certified holds a 5.0-star rating across 7 verified homeowner reviews.

Is ADU Certified licensed and insured?

Yes. ADU Certified holds an active CSLB license (1041789), classified B - General Building Contractor, and is bonded and insured.

How much does ADU Certified charge to build an ADU?

ADU Certified prices every ADU per project — your cost depends on size, finishes, and site conditions. Garage conversions are the most affordable path; detached units cost more. Pricing is unlocked per project: request a quote to get ADU Certified's exact, no-obligation estimate for your lot.

What areas does ADU Certified serve?

ADU Certified builds ADUs in Long Beach, Huntington Beach, Los Angeles County.

How long does ADU Certified take to build an ADU?

Most ADU projects run 6–12 months end to end — roughly 1–2 months for design and permitting (California caps plan check at 60 days for compliant units) and 4–8 months of construction. ADU Certified confirms a timeline for your specific project during the feasibility consultation.

How do I get a quote from ADU Certified?

Tap any "Get a Quote" button on this page to share a few details about your property and project. We'll confirm your service area, match you directly with ADU Certified, and set up your free feasibility consultation — no obligation.

Where ADU Certified works

Long Beach, CAService-area map
Street View
  • City Building & Safety
  • Planning Department
  • Permit Center

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