Clayco has helped clients turn their goals into groundbreaking projects for a variety of Commercial building types.

Along the way, we’ve completely redesigned the way a building company brings value to clients. Our integrated, full-services approach enables us to provide real estate services—from financing to leasing—and a truly collaborative design and construction process that fast-tracks our clients’ most riskiest, complex and iconic projects.

It’s the intersection of creativity, design, execution, with an eye on the practical considerations of timing and budgets. When this is all owned by a single integrated team that operates without functional silos, the results are projects that fully meet the dreams, desires and expectations of clients.

Tom Sieckhaus

Executive Vice President, Corporate Business Unit Leader


Ryan McGuire

Vice President, Corporate Business Unit Leader, Chicago


Willis Tower Transformation Project
Chicago, Illinois
Approximately 460,000-square-feet of existing space within the Tower will be reconfigured. — Clayco, in a partnership and joint venture with Turner Construction...
Dominion’s New Downtown Office Tower
Richmond, Virginia
This project will include a high-performance workplace, street level retail, employee amenities, and parking for more than 1000 employees. — Richmond-based Hourigan...
Zurich North America Headquarters
Schaumburg, Illinois
The new Zurich North America Headquarters was designed to reflect the company’s global reach and world-class stature. — The new Zurich North...
Centene Centre
Clayton, Missouri
This project will be complete with new office spaces, residential living, ground level retail, structured parking and a civic center...
Novus Global Headquarters & Laboratories
Novus International, a global developer of animal health and nutrition programs, partnered with Clayco to create a new global headquarters...
Busch Stadium
St. Louis, Missouri
The project features 46,000 seats, 3,706 club seats and 61 luxury suites, as well as housing 40,000 square feet of...
Reinsurance Group of America
St. Louis, Missouri
The design of the headquarters reflects both the global brand of RGA and the local roots of its people, by...
Gateway Plaza
Richmond, Virginia
The tower is clad in a high-performance glass curtainwall system with both butt-glazed facades and expressed aluminum frames. — This elegant, state-of-the-art...
World Wide Technology Headquarters
St. Louis, Missouri
The headquarters appears to rise out of the lake with an exterior private patio on the north side overlooking the...
Centene Plaza
Clayton, Missouri
The development is a 21-story office tower with a 1,700-space parking garage and a public plaza with decorative landscaping, including...