ADU builder? The featured spot in your city is open. Call or text 424-298-3600

ADU Builders in South Gate, CA

53 builders · ranked by Google rating and review volume · 30 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 South Gate homeowners who are comparing builders right now. Includes your logo, project photos, a direct call button and a link to your website.

📞 Call 424-298-3600💬 Text 424-298-3600

Located in Los Angeles County, South Gate had a 2020 Census population of about 92,726. We found 53 ADU builders and contractors that show up for South Gate homeowners on Google Maps, 7 of them based in the city itself. Their average Google rating is 4.8 stars. 10 market themselves specifically as ADU builders, and 2 mention garage conversions. 30 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are Domus Design Build, JCM Construction and Hybrid Renovations.

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.

#3

Hybrid Renovations

4.9 (162 Google reviews)
✔ CSLB License Verified #1134177

10350 Heritage Park Dr Ste 204, Santa Fe Springs, CA 90670

Serves South Gate · based in Santa Fe Springs
Remodels & additionsGeneral contractor
CallWebsiteView profile
#5

RS Construction

5.0 (26 Google reviews)
✔ CSLB License Verified #944870

6052 Buell St, Bell Gardens, CA 90201

Serves South Gate · based in Bell Gardens
Remodels & additionsGeneral contractor
CallWebsiteView profile
#22

Casas Construction

5.0 (6 Google reviews)
✔ CSLB License Verified #1101290

2181 S Atlantic Blvd Ste 212, Commerce, CA 90040

Serves South Gate · based in Commerce
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#27

Nash Framing & Construction

4.8 (9 Google reviews)
✔ CSLB License Verified #1095699

2567 E 54th St, Huntington Park, CA 90255

Serves South Gate · based in Huntington Park
Remodels & additionsHome builderGeneral contractor
CallView profile
#34

A.D.U. Builders

5.0 (2 Google reviews)
✔ CSLB License Verified #1080549

217 E Victoria Ave, Montebello, CA 90640

Serves South Gate · based in Montebello
ADU specialist
CallWebsiteView profile
#39

Fiero Development

4.5 (4 Google reviews)
✔ CSLB License Verified #1155500

11029 Atlantic Ave, Lynwood, CA 90262

Serves South Gate · based in Lynwood
General contractor
CallView profile
#41

Expert Home Builders

4.4 (304 Google reviews)
✔ CSLB License Verified #1056600

5800 S Eastern Ave Suit 500, Commerce, CA 90040

Serves South Gate · based in Commerce
Home builderGeneral contractor
CallWebsiteView profile
#46

ADU

No rating yet (0 Google reviews)

13809 Actina Ave, Bellflower, CA 90706

Serves South Gate · based in Bellflower
ADU specialist
View profile
#47

KWalker Build

No rating yet (0 Google reviews)

5701 S Figueroa St, Los Angeles, CA 90037

Serves South Gate · based in Los Angeles
Home builderGeneral contractor
CallWebsiteView profile
#48

A.D.U KINGS

No rating yet (0 Google reviews)

Service-area business · Huntington Park

Serves South Gate · based in Huntington Park
Home builder
CallView profile

Permits and pre-approved plans in South Gate

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

Planning an ADU in South Gate? Start here

The ADU Permit Process in California: Step by Step (2026)How to Choose an ADU Builder in Southern California: 15-Point ChecklistHow Long Does It Take to Build an ADU in Southern California?Garage Conversion ADU Cost in Southern California (and What Drives It)

All ADU guides →

South Gate ADU FAQ

How many ADU builders serve South Gate?

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

Do I need a permit to build an ADU in South Gate?

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

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 South Gate 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
📞 Call 424-298-3600💬 Text us