1,600 people in 24 cities living 4 values for 1 goal:
To use design to help our clients succeed.

We create exceptional environments that meet our clients' most complex design challenges.

We inspire people through our work by expressing timeless cultural, organizational and personal values.

We connect people and place with ideas that come from many minds and imaginations.

We care about serving our clients, enriching lives, improving communities and protecting our natural environment through design.

We are a global architecture, design, engineering and planning firm.

60+ Years of Design + Innovation

Revitalizing a Postmodern Landmark

700 Market
St. Louis, Missouri, USA

HOK provided design services for an extensive redevelopment led by The Koman Group to accommodate employees of The Laclede Group in the company’s new downtown headquarters in the former General American Building.

As one of the “youngest” buildings in the National Register of Historic Places, the postmodern landmark structure, renamed 700 Market, was originally designed by Philip Johnson. Because of the dramatically sloped grade, Johnson’s style of designing buildings on a clean, flat plane, where they can meet the site, had not been realized. The design team’s challenge was to redevelop the site to meet the needs of the new users within while preserving the character of this iconic building.

To resolve the grade issue, the design creates a grand flight of stairs leading to a formal entry plaza. Immaculately detailed in concrete and simple forms, this entry plaza honors Johnson’s original vision. 

Tucked into the grade of the site, the east courtyard creates intimate meeting areas along the side of the building. With a lush backdrop to the city, this space gives building occupants respite from the public realm. 

An 18,000-sq.-ft. rooftop garden courtyard on the building’s fifth floor offers space for collaboration and socialization. This terrace provides sweeping views of the Gateway Arch and St. Louis skyline. The green roof’s vegetated planter trays, trees, shrubs and sodded lawn area help insulate the building and conserve energy while managing the stormwater. Highlighted by a dynamic lighting system, the terrace features a fitness path, programmable lawn and paved event space that accommodates corporate or civic functions. 


64,950 sq. ft. / 6,030 sq. m.


Landscape Architecture
Lighting Design
Structural Engineering


Concrete Council and American Steel Fabrication — Quality Concrete Award

Mayor’s Business Celebration Awards — Development of the Year Award 


9 April 2015
“Tarlton Corp. Wraps Renovation of Historic 700 Market in Downtown St. Louis”
Midwest Real Estate News