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ADU Builders in Rosemead, CA

32 builders · ranked by Google rating and review volume · 13 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 Rosemead 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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With roughly 51,185 residents at the 2020 Census, Rosemead is one of Los Angeles County's established communities. We found 32 ADU builders and contractors that show up for Rosemead homeowners on Google Maps, 3 of them based in the city itself. Their average Google rating is 4.8 stars. 9 market themselves specifically as ADU builders. 13 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are Zenith Builder, CAP Angeles Construction Inc and Nicholas Construction & Development Company.

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

Zenith Builder

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

Service-area business · Temple City

Serves Rosemead · 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 Rosemead · based in San Marino
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#11

LUDIS INC

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

15 E McLean St, Alhambra, CA 91801

Serves Rosemead · based in Alhambra
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#18

A.D.U. Builders

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

217 E Victoria Ave, Montebello, CA 90640

Serves Rosemead · based in Montebello
ADU specialist
CallWebsiteView profile
#20

LYF Design & Development Inc

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

1201 W Huntington Dr Unit 208, Arcadia, CA 91007

Serves Rosemead · based in Arcadia
General contractor
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#31

Robles Inc ADU

No rating yet (0 Google reviews)

Service-area business · La Puente

Serves Rosemead · based in La Puente
ADU specialist
CallView profile

Permits and pre-approved plans in Rosemead

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

Planning an ADU in Rosemead? Start here

ADU Rental Income and Property Taxes in California: What to ExpectTwo-Story and Above-Garage ADUs in California: Height Rules, Costs and DesignAB 1033: Can You Sell an ADU Separately in California?SB 9 vs ADU: Lot Splits, Duplexes and Backyard Units in California

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Rosemead ADU FAQ

How many ADU builders serve Rosemead?

Our directory lists 32 ADU builders and contractors that appear for Rosemead on Google Maps, including companies based in nearby Los Angeles County communities.

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

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

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 Rosemead 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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