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ADU Builders in San Gabriel, CA

41 builders · ranked by Google rating and review volume · 17 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 San Gabriel 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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Located in Los Angeles County, San Gabriel had a 2020 Census population of about 39,568. We found 41 ADU builders and contractors that show up for San Gabriel homeowners on Google Maps, 2 of them based in the city itself. Their average Google rating is 4.7 stars. 9 market themselves specifically as ADU builders. 17 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are Coronado Construction Company Inc, Zenith Builder and CAP Angeles Construction 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

Zenith Builder

5.0 (46 Google reviews)
✔ CSLB License Verified #1035285

Service-area business · Temple City

Serves San Gabriel · based in Temple City
Remodels & additions
CallWebsiteView profile
#4

Willbii Inc.

5.0 (22 Google reviews)
✔ CSLB License Verified #1108001

2158 Huntington Dr, San Marino, CA 91108

Serves San Gabriel · based in San Marino
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#5

Teamup Construction

5.0 (17 Google reviews)
✔ CSLB License Verified #1134224

35 N Lake Ave #710, Pasadena, CA 91101

Serves San Gabriel · based in Pasadena
Remodels & additionsHome builderGeneral contractor
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#11

Nott & Associates

5.0 (8 Google reviews)
✔ CSLB License Verified #746905

1508 Mission St, South Pasadena, CA 91030

Serves San Gabriel · based in South Pasadena
Remodels & additionsHome builderGeneral contractor
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#13

Accurate Builders and Repair

5.0 (7 Google reviews)
✔ CSLB License Verified #922391

5641 Cambury Ave, Temple City, CA 91780

Serves San Gabriel · based in Temple City
Remodels & additionsGeneral contractor
CallView profile
#14

LUDIS INC

5.0 (7 Google reviews)
✔ CSLB License Verified #1061815

15 E McLean St, Alhambra, CA 91801

Serves San Gabriel · based in Alhambra
Remodels & additionsHome builderGeneral contractor
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#25

LYF Design & Development Inc

5.0 (2 Google reviews)
✔ CSLB License Verified #1072862

1201 W Huntington Dr Unit 208, Arcadia, CA 91007

Serves San Gabriel · based in Arcadia
General contractor
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#28

MiLar Design & Build

4.7 (3 Google reviews)
✔ CSLB License Verified #1152747

812 Fremont Ave, South Pasadena, CA 91030

Serves San Gabriel · based in South Pasadena
Design-buildRemodels & additions
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#41

Robles Inc ADU

No rating yet (0 Google reviews)

Service-area business · La Puente

Serves San Gabriel · based in La Puente
ADU specialist
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Permits and pre-approved plans in San Gabriel

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

Planning an ADU in San Gabriel? Start here

Prefab and Modular ADUs in California: Real Costs, Permits and PitfallsGarage Conversion ADU Cost in Southern California (and What Drives It)Two-Story and Above-Garage ADUs in California: Height Rules, Costs and DesignHow to Choose an ADU Builder in Southern California: 15-Point Checklist

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San Gabriel ADU FAQ

How many ADU builders serve San Gabriel?

Our directory lists 41 ADU builders and contractors that appear for San Gabriel on Google Maps, including companies based in nearby Los Angeles County communities.

Do I need a permit to build an ADU in San Gabriel?

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

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 San Gabriel 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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