ADU Contractors in Santa Ysabel, CA — License-Verified Contractors
Every contractor below holds an active California license with an office of record in Santa Ysabel, 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
10 license-verified contractors based in Santa Ysabel
Evins Masonry Inc
BC-29C-8Gaston Engineering Inc
AHaworth Jim Plumbing Service
C-36Killiane Construction
BR1 Construction And Remodeling Inc
BRaynik Construction
BSulser And Sons
BTribal Contracting Association
BVolcan Builders Pc
BData source: CSLB public records as of November 6, 2026 · Verify any license at CSLB