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ADU Builders in Hawthorne, CA

47 builders · ranked by Google rating and review volume · 27 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 Hawthorne 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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Hawthorne is home to about 88,083 people (2020 Census) in Los Angeles County. We found 47 ADU builders and contractors that show up for Hawthorne homeowners on Google Maps, 6 of them based in the city itself. Their average Google rating is 4.8 stars. 8 market themselves specifically as ADU builders, and 2 mention garage conversions. 27 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are Home Remodeling Builders, SHINE INVEST and Direct ADU.

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.

#1

Home Remodeling Builders

5.0 (85 Google reviews)
✔ CSLB License Verified #1131012

1500 Rosecrans Ave #500, Manhattan Beach, CA 90266

Serves Hawthorne · based in Manhattan Beach
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#2

SHINE INVEST

5.0 (62 Google reviews)
✔ CSLB License Verified #1079290

1230 Rosecrans Ave, Manhattan Beach, CA 90266

Serves Hawthorne · based in Manhattan Beach
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#6

Lux Builders & Remodeling Inc.

4.9 (54 Google reviews)
✔ CSLB License Verified #864453

1020 Manhattan Beach Blvd Ste 208, Manhattan Beach, CA 90266

Serves Hawthorne · based in Manhattan Beach
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#7

Aza Construction

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

4304 W 149th St, Lawndale, CA 90260

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

Waconah Construction

4.8 (16 Google reviews)
✔ CSLB License Verified #908219

616 Edgewood St, Inglewood, CA 90302

Serves Hawthorne · based in Inglewood
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#24

Cover

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

1415 W 178th St, Gardena, CA 90248

Serves Hawthorne · based in Gardena
Prefab / modularHome builderGeneral contractor
CallWebsiteView profile
#29

Builders Trust Construction

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

Service-area business · Lawndale

Serves Hawthorne · based in Lawndale
Remodels & additionsGeneral contractor
CallView profile
#35

A.D.U KINGS

No rating yet (0 Google reviews)

Service-area business · Huntington Park

Serves Hawthorne · based in Huntington Park
Home builder
CallView profile
#37

ADU Bros

No rating yet (0 Google reviews)

Service-area business · Hawthorne

Serves Hawthorne · based in Hawthorne
ADU specialist
CallWebsiteView profile
#41

MaxxADU

No rating yet (0 Google reviews)

Service-area business · Lawndale

Serves Hawthorne · based in Lawndale
ADU specialist
CallWebsiteView profile
#47

J Izucar Construction

No rating yet (0 Google reviews)

Service-area business · Inglewood

Serves Hawthorne · based in Inglewood
Remodels & additionsGeneral contractor
CallView profile

Permits and pre-approved plans in Hawthorne

ADU permits in Hawthorne 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 Hawthorne whether it has approved plans you can use. See our pre-approved plans guide and California ADU law summary.

Planning an ADU in Hawthorne? Start here

SB 9 vs ADU: Lot Splits, Duplexes and Backyard Units in CaliforniaHow Much Does It Cost to Build an ADU in Southern California?AB 1033: Can You Sell an ADU Separately in California?Prefab and Modular ADUs in California: Real Costs, Permits and Pitfalls

All ADU guides →

Hawthorne ADU FAQ

How many ADU builders serve Hawthorne?

Our directory lists 47 ADU builders and contractors that appear for Hawthorne on Google Maps, including companies based in nearby Los Angeles County communities.

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

Yes. ADUs need a building permit from the City of Hawthorne, 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 Hawthorne?

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 Hawthorne 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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