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ADU Builders in Lancaster, CA

12 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 Lancaster 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 173,516 residents at the 2020 Census, Lancaster is one of Los Angeles County's largest communities. We found 12 ADU builders and contractors that show up for Lancaster homeowners on Google Maps, 4 of them based in the city itself. Their average Google rating is 5.0 stars. 1 market themselves specifically as ADU builders, and 1 mention garage conversions. 7 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are VIP General Contractors Inc, James R Johnson Contractors and AV General Construction Inc.

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

Jimhera Developers

5.0 (2 Google reviews)
✔ CSLB License Verified #1122217

Service-area business · Palmdale

Serves Lancaster · based in Palmdale
Home builderGeneral contractor
CallWebsiteView profile
#9

IronBuilt Inc.

5.0 (1 Google reviews)
✔ CSLB License Verified #877469

626 W Lancaster Blvd #53, Lancaster, CA 93534

Based in Lancaster
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile

Permits and pre-approved plans in Lancaster

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

Planning an ADU in Lancaster? Start here

The ADU Permit Process in California: Step by Step (2026)Two-Story and Above-Garage ADUs in California: Height Rules, Costs and DesignPrefab and Modular ADUs in California: Real Costs, Permits and PitfallsSB 9 vs ADU: Lot Splits, Duplexes and Backyard Units in California

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Lancaster ADU FAQ

How many ADU builders serve Lancaster?

Our directory lists 12 ADU builders and contractors that appear for Lancaster on Google Maps, including companies based in nearby Los Angeles County communities.

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

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

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