ADU Contractors in Santa Clarita, CA — License-Verified Contractors
Every contractor below holds an active California license with an office of record in Santa Clarita, verified against CSLB public data as of November 6, 2026: general builders — A (General Engineering) and B (General Building), the classifications that can build an ADU — and the licensed trades ADU construction uses, C-10 Electrical, C-36 Plumbing and C-5 Framing & Rough Carpentry. Listings are alphabetical; the featured builder is labeled, never ranked.
ADU rules — setbacks, size limits, parking, and fees — are set by the local jurisdiction and change often. Before you hire, read the ADU permit process guide and the Southern California ADU cost guide, and verify any license free at CSLB.
Mars Construction Industries Corp
ADU Cities' own design-build team
CSLB #1138550 · A · B · C-36 · C-20
Building ADUs across Los Angeles, Orange, Riverside, San Bernardino, San Diego & Ventura counties
379 license-verified contractors based in Santa Clarita — page 8 of 8
Trans-pacific Engineering Co Inc
ABTranscend Construction & Design Inc
BTriple S Plumbing Inc
C-36True North Construction
BTuttle Greg Plumbing
C-36C-55HAZU S Sign & Lighting Maintenance Co
C-10C-45C-7Uhl James G
BUpscale Construction & Restoration Inc
BV-electric Inc
C-10Vargas-salgado Ezequiel
BW T B Construction
BWatson Plumbing
C-36Wessel Pump & Mechanical Inc
C-36West Coast Master Builders Inc
ABC-10C-20D-12West Coast Water Heaters
C-36Westside General Contracting
BWestway Electric Systems Inc
C-10Wg & S Plumbing Co
C-36Williams Homes Inc
BWilliams Rebuild
Williams & Watt Builders LLC
BWilson E Company
BWinter Randal G Construction Inc
ASBBC-10C-27C-33C-36C-54C-8C-9Withers William
ABC-10C-36HAZWright R B Construction
BXtremelectric & Lighting
C-10Yaqui Construction Group Inc
BZabin Electric Inc
C-10Zavala Electric Company
C-10Data source: CSLB public records as of November 6, 2026 · Verify any license at CSLB