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ADU Builders in Montebello, CA

15 builders · ranked by Google rating and review volume · 8 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 Montebello 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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Montebello is home to about 62,640 people (2020 Census) in Los Angeles County. We found 15 ADU builders and contractors that show up for Montebello homeowners on Google Maps, 1 of them based in the city itself. Their average Google rating is 4.7 stars. 7 market themselves specifically as ADU builders, and 1 mention garage conversions. 8 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are Domus Design Build, ADU HVAC Monterey Park and Cornejos Builders ADU Construction & Home Building.

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.

#4

Casas Construction

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

2181 S Atlantic Blvd Ste 212, Commerce, CA 90040

Serves Montebello · based in Commerce
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#5

XactBuilt ADU & Construction

5.0 (4 Google reviews)
✔ CSLB License Verified #1092832

11721 Whittier Blvd suite 170, Whittier, CA 90601

Serves Montebello · based in Whittier
ADU specialistRemodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#12

Expert Home Builders

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

5800 S Eastern Ave Suit 500, Commerce, CA 90040

Serves Montebello · based in Commerce
Home builderGeneral contractor
CallWebsiteView profile
#15

Robles Inc ADU

No rating yet (0 Google reviews)

Service-area business · La Puente

Serves Montebello · based in La Puente
ADU specialist
CallView profile

Permits and pre-approved plans in Montebello

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

Planning an ADU in Montebello? Start here

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Montebello ADU FAQ

How many ADU builders serve Montebello?

Our directory lists 15 ADU builders and contractors that appear for Montebello on Google Maps, including companies based in nearby Los Angeles County communities.

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

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

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 Montebello 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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