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ADU Builders in Santa Clarita, CA

27 builders · ranked by Google rating and review volume · 15 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 Santa Clarita 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 228,673 residents at the 2020 Census, Santa Clarita is one of Los Angeles County's largest communities. We found 27 ADU builders and contractors that show up for Santa Clarita homeowners on Google Maps, 3 of them based in the city itself. Their average Google rating is 5.0 stars. 8 market themselves specifically as ADU builders, and 1 mention garage conversions. 15 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are Dave's Remodeling Inc., UPS GENERAL CONTRACTOR & ADU and Patio 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.

#8

Westlake ADU LLC

5.0 (9 Google reviews)
✔ CSLB License Verified #1119001

10720 Haskell Ave, Granada Hills, CA 91344

Serves Santa Clarita · based in Granada Hills
ADU specialistGeneral contractor
CallWebsiteView profile
#10

ADU Agency

5.0 (6 Google reviews)

Service-area business · San Fernando

Serves Santa Clarita · based in San Fernando
ADU specialistHome builder
CallWebsiteView profile
#11

Coto Construction

5.0 (6 Google reviews)
✔ CSLB License Verified #966519

708 Arroyo St, San Fernando, CA 91340

Serves Santa Clarita · based in San Fernando
General contractor
CallWebsiteView profile
#12

America Green Builders

5.0 (6 Google reviews)
✔ CSLB License Verified #1020657

Service-area business · Santa Clarita

Serves Santa Clarita · based in Santa Clarita
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#13

Alvapareen Construction

5.0 (6 Google reviews)
✔ CSLB License Verified #1081852

18039 Chatsworth St #33603, Granada Hills, CA 91344

Serves Santa Clarita · based in Granada Hills
Remodels & additionsGeneral contractor
CallWebsiteView profile
#15

DEVTEC

5.0 (4 Google reviews)
✔ CSLB License Verified #1136856

Service-area business · Santa Clarita

Serves Santa Clarita · based in Santa Clarita
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#17

Perfect ADU & Remodeling inc

5.0 (3 Google reviews)
✔ CSLB License Verified #1123657

21700 Golden Triangle Rd Unit 106, Santa Clarita, CA 91350

Based in Santa Clarita
ADU specialistRemodels & additionsHome builderGeneral contractor
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#23

Sefain Construction Group

5.0 (1 Google reviews)
✔ CSLB License Verified #1151622

Service-area business · Santa Clarita

Serves Santa Clarita · based in Santa Clarita
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#24

Creative ADU Concepts

No rating yet (0 Google reviews)
✔ CSLB License Verified #1142102

Service-area business · Santa Clarita

Serves Santa Clarita · based in Santa Clarita
ADU specialistHome builder
CallView profile
#26

ADU Lords

No rating yet (0 Google reviews)

Service-area business · San Fernando

Serves Santa Clarita · based in San Fernando
ADU specialistGeneral contractor
CallWebsiteView profile

Permits and pre-approved plans in Santa Clarita

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

Planning an ADU in Santa Clarita? Start here

SB 9 vs ADU: Lot Splits, Duplexes and Backyard Units in CaliforniaTwo-Story and Above-Garage ADUs in California: Height Rules, Costs and DesignThe ADU Permit Process in California: Step by Step (2026)JADU vs ADU in California: Size, Rules, Cost and Which to Build

All ADU guides →

Santa Clarita ADU FAQ

How many ADU builders serve Santa Clarita?

Our directory lists 27 ADU builders and contractors that appear for Santa Clarita on Google Maps, including companies based in nearby Los Angeles County communities.

Do I need a permit to build an ADU in Santa Clarita?

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

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 Santa Clarita 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 119Glendale 117Lancaster 12Palmdale 12Pomona 67Torrance 98Pasadena 100Downey 28West Covina 68El Monte 24Inglewood 46
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