

O'Hara's Son Roofing (OSR)
OSR is a national commercial and industrial roofing provider headquartered in Chicago, IL. Established in 1987, OSR ranks among the Top 20 Roofing Contractors in the country (Top 10 among exclusively commercial roofing companies) and is registered and licensed in 48 states. As one of the fastest-growing commercial roofing companies, our growth has been driven largely by recurring business from numerous respected general contractors, architects, engineers, and building owners nationwide.
O’Hara’s Son Roofing (OSR)
OSR is a national commercial and industrial roofing provider headquartered in Chicago, IL. Established in 1987, OSR ranks among the Top 20 Roofing Contractors in the country (Top 10 among exclusively commercial roofing companies) and is registered and licensed in 48 states. As one of the fastest-growing commercial roofing companies, our growth has been driven largely by recurring business from numerous respected general contractors, architects, engineers, and building owners nationwide.

Big Roof Pros Coast to Coast
We specialize in installing various styles of roof applications and coatings. Our expertise spans a wide range of commercial buildings, including data centers, cold storage facilities, manufacturing plants, warehouses, retail spaces, and other commercial properties. Additionally, we offer extensive roof repairs, maintenance, OSHA-compliant safety items, and renewable energy solutions.

A Commercial Roofing Powerhouse
Since 1987, O’Hara’s Son Roofing (OSR) has specialized in new commercial roof construction, roof replacement, leak repair, and preventative maintenance. In 2012, OSR shifted its focus exclusively to commercial roofing—a strategic move that has driven consistent year-over-year revenue growth. Today, OSR ranks among the top 10 commercial roofing companies in the United States. The company is licensed, insured, and bonded, and is registered to operate in 48 states.
A Commercial Roofing Powerhouse
Since 1987, O’Hara’s Son Roofing (OSR) has specialized in new commercial roof construction, roof replacement, leak repair, and preventative maintenance. In 2012, OSR shifted its focus exclusively to commercial roofing—a strategic move that has driven consistent year-over-year revenue growth. Today, OSR ranks among the top 10 commercial roofing companies in the United States. The company is licensed, insured, and bonded, and is registered to operate in 48 states.



Mission
To provide the highest quality service, materials, and workmanship while maintaining our reputation as one of the nation’s best roofing companies.

Vision
To be the first choice commercial roofing company in the nation for customers as well as employees.