BSI Constructors Inc.

BSI Constructors Inc. is a good fit for developers, owners, and institutions that need a seasoned general contractor capable of handling medium‑ to large‑scale commercial and institutional projects. Based at 6767 Southwest Ave, St. Louis, MO 63143, USA, the firm has been delivering construction solutions in the St. Louis region since its founding on December 18, 1972 by Lorenz T. Bannes and Joseph F. Shaughnessy. Early milestones include the first $1 million contract for Hazelwood Central Senior High School in 1976, a $5 million headquarters project in Chesterfield in 1981, and a $10 million university medical library in 1987, illustrating a track record of managing complex builds.

The company operates from a 30,000‑square‑foot office and a 20,000‑square‑foot warehouse situated on a 3.3‑acre campus at its Southwest Avenue location. Ownership has evolved from the original founders to a broad group of active employees, with the Shaughnessy family still playing a leadership role. BSI’s services focus on general contracting and comprehensive construction management, emphasizing quality, integrity, and the ability to deliver unique building projects. Clients seeking reliable execution of commercial, educational, or healthcare facilities can rely on BSI Constructors’ long‑standing experience and locally rooted presence.