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ADU Builders in Gardena, CA

53 builders · ranked by Google rating and review volume · 29 CSLB license verified

★ Featured ADU builder

Featured ADU builder — this spot is open

Put your ADU company at the top of this page, in front of Gardena homeowners who are comparing builders right now. Includes your logo, project photos, a direct call button and a link to your website.

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Gardena is home to about 61,027 people (2020 Census) in Los Angeles County. We found 53 ADU builders and contractors that show up for Gardena homeowners on Google Maps, 5 of them based in the city itself. Their average Google rating is 4.7 stars. 11 market themselves specifically as ADU builders, and 2 mention garage conversions. 29 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are Envision More Renovations, Direct ADU and Rehab Building Company, Inc..

Los Angeles leads California in ADU permits. Common projects here include garage conversions on older lots, detached backyard units on deep lots, and hillside sites where access and grading drive the cost.

#2

Direct ADU

5.0 (36 Google reviews)

11853 S Inglewood Ave, Hawthorne, CA 90250

Serves Gardena · based in Hawthorne
ADU specialistGarage conversionsHome builder
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#8

Aza Construction

5.0 (17 Google reviews)
✔ CSLB License Verified #1091323

4304 W 149th St, Lawndale, CA 90260

Serves Gardena · based in Lawndale
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#16

ADU Certified

5.0 (8 Google reviews)
✔ CSLB License Verified #1041789

4201 Long Beach Blvd #422, Long Beach, CA 90807

Serves Gardena · based in Long Beach
ADU specialistRemodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#17

Ohka Construction

5.0 (8 Google reviews)
✔ CSLB License Verified #1131944

3711 Long Beach Blvd, Long Beach, CA 90807

Serves Gardena · based in Long Beach
General contractor
CallWebsiteView profile
#27

Cover

4.7 (23 Google reviews)
✔ CSLB License Verified #1039029

1415 W 178th St, Gardena, CA 90248

Based in Gardena
Prefab / modularHome builderGeneral contractor
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#31

Builders Trust Construction

5.0 (2 Google reviews)
✔ CSLB License Verified #1080695

Service-area business · Lawndale

Serves Gardena · based in Lawndale
Remodels & additionsGeneral contractor
CallView profile
#42

The ADU Builder

No rating yet (0 Google reviews)
✔ CSLB License Verified #1144893

3646 Long Beach Blvd, Long Beach, CA 90807

Serves Gardena · based in Long Beach
ADU specialist
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#43

ADU MAXX

No rating yet (0 Google reviews)

4401 Atlantic Ave #200, Long Beach, CA 90807

Serves Gardena · based in Long Beach
ADU specialist
CallWebsiteView profile
#47

ADU Bros

No rating yet (0 Google reviews)

Service-area business · Hawthorne

Serves Gardena · based in Hawthorne
ADU specialist
CallWebsiteView profile
#48

MaxxADU

No rating yet (0 Google reviews)

Service-area business · Lawndale

Serves Gardena · based in Lawndale
ADU specialist
CallWebsiteView profile

Permits and pre-approved plans in Gardena

ADU permits in Gardena go through the city's building or planning department. Under AB 1332, every California city and county had to set up a pre-approved ADU plan program by January 1, 2025, so ask Gardena whether it has approved plans you can use. See our pre-approved plans guide and California ADU law summary.

Planning an ADU in Gardena? Start here

The ADU Permit Process in California: Step by Step (2026)Prefab and Modular ADUs in California: Real Costs, Permits and PitfallsGarage Conversion ADU Cost in Southern California (and What Drives It)How to Choose an ADU Builder in Southern California: 15-Point Checklist

All ADU guides →

Gardena ADU FAQ

How many ADU builders serve Gardena?

Our directory lists 53 ADU builders and contractors that appear for Gardena on Google Maps, including companies based in nearby Los Angeles County communities.

Do I need a permit to build an ADU in Gardena?

Yes. ADUs need a building permit from the City of Gardena, which must approve or deny a complete application within 60 days under state law. Many cities also offer pre-approved plans that speed up review.

How much does an ADU cost in Gardena?

Most Southern California detached ADUs land around $350 to $550 per square foot all-in, garage conversions around $200 to $350, and JADUs around $50,000 to $150,000. Use our ADU cost estimator and get three itemized bids.

How are Gardena ADU builders ranked here?

By Google rating weighted by the number of reviews, so a 4.9 with 200 reviews ranks above a 5.0 with 3. Featured placements are clearly labeled and don't affect the organic ranking.

Nearby cities in Los Angeles County

Los Angeles 118Long Beach 119Santa Clarita 27Glendale 117Lancaster 12Palmdale 12Pomona 67Torrance 98Pasadena 100Downey 28West Covina 68El Monte 24
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