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

A Corporate Headquarters Engineered for Flexibility and Efficiency

Phillips 66 Headquarters
Houston, Texas, USA

Phillips 66’s new headquarters brings together 2,200 employees on a 14-acre campus in Houston’s vibrant Westchase District.

HOK designed this 1 million-sq.-ft. facility, which is targeting LEED Silver certification, to promote employee collaboration and wellness.

The headquarters, consisting of two office towers and a parking garage with rooftop sports courts, features informal meeting spaces, employee cafeteria, executive boardrooms and conference spaces, and a staff training center. To support work-life balance, the campus includes an on-site fitness center, medical and dental offices, and two credit union branches.

Our engineering team designed several features to improve efficiencies and reduce life-cycle costs. High-performance HVAC systems achieve ultra-energy efficiency while providing highly reliable operations, ease of maintenance and extreme flexibility. A chilled water plant features N+1 equipment with complete variable-speed operation configured in a manifold arrangement and regulated through hot-swappable controllers using sophisticated plant optimization software.

Office levels have raised access floors that are flexible to support Phillips 66’s changing space and technology needs over time. Our team designed a high-performance underfloor air distribution HVAC system that serves more than half a million square feet of offices.

An advanced building automation system integrates multiple building systems on a common platform across a shared network to effectively operate the facility.

Structural steel framing, including composite deck slabs and strategically located concentric-braced frames, accommodates the buildings’ open plans and provides future flexibility for the office towers. Our engineering team used post-tensioned, cast-place-concrete for the parking structure to support the additional requirements of the central utility plant, electrical vault and a net-enclosed sports court on the rooftop. 

The connecting bridge between the office towers contains a series of two-story trusses. Our team used advanced analysis to eliminate the need for an expansion joint in the bridge between the towers. Drilled piers, mat slabs, spread footings and two-way structural slabs-on grade support the buildings while mitigating the highly expansive soil conditions.


LEED Platinum


1 million sq. ft. / 92,900 sq. m.


Building Enclosure
Facility Strategies
Interior Design
Landscape Architecture
Lighting Design
   Fire Protection Engineering
Structural Engineering


Houston Business Journal – Landmark Awards, Office Building Category


Phillips 66 employees from four previous locations


15 July 2016
“HOK Designs Self-Contained City for Phillips 66 Headquarters”
St. Louis Business Journal

25 June 2016
“First Look: Inside Phillips 66’s New Houston HQ
Houston Business Journal