O'Hara's Son Roofing Company (OSR)

O’Hara's Son Roofing (OSR), established in 1987, began as a family-owned and operated company serving the residential, commercial, and industrial roofing market. Since then, OSR has transitioned exclusively to commercial roofing and has grown steadily year over year, becoming one of the nation’s top commercial roofing companies. Headquartered in Chicago, IL, our dedicated team is committed to delivering high-quality work with a strong focus on safety and clear communication. We specialize in new construction, roof replacement, leak repair, and preventive maintenance. No matter where in the nation our clients are located, we provide consistent, reliable service with the same high standards.