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ADU Builders in West Covina, CA

68 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 West Covina 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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West Covina is home to about 109,501 people (2020 Census) in Los Angeles County. We found 68 ADU builders and contractors that show up for West Covina homeowners on Google Maps, 5 of them based in the city itself. Their average Google rating is 4.8 stars. 24 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 Ramirez Drywall & Taping, Zenith Builder and Skilled Home Builders.

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 West Covina · based in Temple City
Remodels & additions
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#10

Capy Construction

5.0 (15 Google reviews)
✔ CSLB License Verified #1120565

Service-area business · Walnut

Serves West Covina · based in Walnut
Remodels & additionsHome builderGeneral contractor
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#13

Lopez United Inc

5.0 (14 Google reviews)
✔ CSLB License Verified #841932

11991 Silicon Ave, Chino, CA 91710

Serves West Covina · based in Chino
Remodels & additionsHome builderGeneral contractor
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#21

Accurate Builders and Repair

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

5641 Cambury Ave, Temple City, CA 91780

Serves West Covina · based in Temple City
Remodels & additionsGeneral contractor
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#23

The ADU Company

5.0 (6 Google reviews)
✔ CSLB License Verified #1118354

504 E Navilla Pl, Covina, CA 91723

Serves West Covina · based in Covina
ADU specialistRemodels & additionsHome builderGeneral contractor
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#29

XactBuilt ADU & Construction

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

11721 Whittier Blvd suite 170, Whittier, CA 90601

Serves West Covina · based in Whittier
ADU specialistRemodels & additionsHome builderGeneral contractor
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#32

DMAX Construction

5.0 (4 Google reviews)

621 N Monte Vista Ave, San Dimas, CA 91773

Serves West Covina · based in San Dimas
Remodels & additionsGeneral contractor
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#33

LYCC DEVELOPMENT

5.0 (4 Google reviews)

737 Glendora Ave Ste 203, La Puente, CA 91744

Serves West Covina · based in La Puente
General contractor
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#34

The ADU Pro

4.7 (15 Google reviews)
✔ CSLB License Verified #1128679

15338 Central Ave, Chino, CA 91710

Serves West Covina · based in Chino
ADU specialistHome builderGeneral contractor
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#36

ADU Experts

5.0 (3 Google reviews)

Service-area business · Azusa

Serves West Covina · based in Azusa
ADU specialistGeneral contractor
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#37

B & D Construction

4.7 (13 Google reviews)
✔ CSLB License Verified #409057

1472 Avenida Loma Vista, San Dimas, CA 91773

Serves West Covina · based in San Dimas
Remodels & additionsHome builderGeneral contractor
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#57

CalHome ADU

1.0 (1 Google reviews)

2540 Fulton Rd, Pomona, CA 91767

Serves West Covina · based in Pomona
ADU specialistGeneral contractor
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#59

JLF ADU

No rating yet (0 Google reviews)
✔ CSLB License Verified #1075968

4716 N Fircroft Ave, Covina, CA 91722

Serves West Covina · based in Covina
ADU specialist
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#63

Robles Inc ADU

No rating yet (0 Google reviews)

Service-area business · La Puente

Serves West Covina · based in La Puente
ADU specialist
CallView profile
#65

ADU Express

No rating yet (0 Google reviews)

Service-area business · Duarte

Serves West Covina · based in Duarte
ADU specialist
CallView profile

Permits and pre-approved plans in West Covina

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

Planning an ADU in West Covina? Start here

How Much Does It Cost to Build an ADU in Southern California?How to Legalize an Unpermitted ADU in California (AB 2533)How Long Does It Take to Build an ADU in Southern California?JADU vs ADU in California: Size, Rules, Cost and Which to Build

All ADU guides →

West Covina ADU FAQ

How many ADU builders serve West Covina?

Our directory lists 68 ADU builders and contractors that appear for West Covina on Google Maps, including companies based in nearby Los Angeles County communities.

Do I need a permit to build an ADU in West Covina?

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

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 West Covina 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 28El Monte 24Inglewood 46
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