Structural Steel Contractors in Ontario, CA
13 Structural Steel contractors in Ontario, California appear in the CSLB public record — 12 with an active license. Check each one's status, bond, workers' compensation, and classifications before you hire.
Journeyman Iron Works Corporation
C-51 · Ontario, CA
Verified August 4, 2026 · Bonded
McIntyre Metal Decking
C-51 · Ontario, CA
Verified August 4, 2026 · Bonded
Luisa Margarita Jimenez Herrera
C-51 · Ontario, CA
Verified August 4, 2026 · Bonded
Kennedy Steel
C-51 · Ontario, CA
Verified August 4, 2026 · Bonded
Aj Claremont Structural Steel Fab Inc
C-51 · Ontario, CA
Verified August 4, 2026 · Bonded
Western Deck and Steel Erection DBA Western Metal Deck
C-51 · Ontario, CA
Verified August 4, 2026 · Bonded
The MC Intyre Company A Calif Partnership
C-51 · Ontario, CA
Verified August 4, 2026 · Bonded
Glenn Kraus Fabrication
C-51 · Ontario, CA
Verified August 4, 2026 · Bonded
K P Construction Co Inc
C-51 · Ontario, CA
Verified August 4, 2026 · Bonded
Maldonado Industries
C-51 · Ontario, CA
Verified August 4, 2026 · Bonded
Steel Design Builders Inc
C-51 · Ontario, CA
Verified August 4, 2026 · Bonded
KP Builders
C-51 · Ontario, CA
Verified August 4, 2026 · Bonded
Designer Works
C-51 · Ontario, CA
Verified August 4, 2026 · Bonded
More Structural Steel cities in California
Before you hire in Ontario
Frequently asked questions
How many Structural Steel contractors are licensed in Ontario, California?
This directory lists 13 Structural Steel contractors in Ontario, California, of which 12 currently hold an active CSLB license.
How do I check if a Structural Steel contractor is licensed in Ontario, California?
Open the contractor's profile here for their dated CSLB status, or look up their license number directly on the CSLB "Check a License" tool. A license must be active (not expired, suspended, or inactive) to be valid.
Should a Structural Steel contractor carry a bond and workers' compensation?
Most active CSLB licensees carry a contractor bond, and any contractor with employees must carry workers' compensation. Each profile shows what the CSLB record reports.