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ADU Builders in San Fernando, CA

21 builders · ranked by Google rating and review volume · 7 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 Fernando 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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San Fernando is home to about 23,946 people (2020 Census) in Los Angeles County. We found 21 ADU builders and contractors that show up for San Fernando homeowners on Google Maps, 3 of them based in the city itself. Their average Google rating is 4.7 stars. 5 market themselves specifically as ADU builders. 7 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are Ca Green Energy, VisionCrest Remodeling and patio installers.

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.

#9

Westlake ADU LLC

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

10720 Haskell Ave, Granada Hills, CA 91344

Serves San Fernando · based in Granada Hills
ADU specialistGeneral contractor
CallWebsiteView profile
#11

ADU Agency

5.0 (6 Google reviews)

Service-area business · San Fernando

Serves San Fernando · based in San Fernando
ADU specialistHome builder
CallWebsiteView profile
#18

ADU 101

No rating yet (0 Google reviews)

10238 Vena Ave, Arleta, CA 91331

Serves San Fernando · based in Arleta
ADU specialist
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#20

ADU Lords

No rating yet (0 Google reviews)

Service-area business · San Fernando

Serves San Fernando · based in San Fernando
ADU specialistGeneral contractor
CallWebsiteView profile
#21

ADU LORDS

No rating yet (0 Google reviews)

Service-area business · San Fernando

Serves San Fernando · based in San Fernando
ADU specialist
CallWebsiteView profile

Permits and pre-approved plans in San Fernando

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

Planning an ADU in San Fernando? Start here

How to Legalize an Unpermitted ADU in California (AB 2533)Two-Story and Above-Garage ADUs in California: Height Rules, Costs and DesignThe ADU Permit Process in California: Step by Step (2026)AB 1033: Can You Sell an ADU Separately in California?

All ADU guides →

San Fernando ADU FAQ

How many ADU builders serve San Fernando?

Our directory lists 21 ADU builders and contractors that appear for San Fernando on Google Maps, including companies based in nearby Los Angeles County communities.

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

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

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 Fernando 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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