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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.

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

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60+ Years of Design + Innovation

A Deep Energy Retrofit for a Federal Office Building in Denver

Byron G. Rogers Federal Office Building and US Courthouse
Denver, Colorado, USA

The team is transforming a 1964 federal building into a cost-effective model of energy efficiency and sustainability.

HOK is the design architect on the design-build team for the modernization of the 18-story Byron G. Rogers Federal Office Building in downtown Denver. The challenge is to design an affordable, highly energy-efficient retrofit of a large, historic existing building while creating a modern, flexible workplace for 11 federal agencies.

The project includes complete design and construction for upgrades to the structural elements and all major building systems. The building upgrades should reduce annual energy costs by 60 to 70 percent.

Building upgrades include the replacement of the mechanical, electrical, lighting, fire protection and plumbing systems, as well as replacement of all exterior windows, an increase to insulation in walls and a complete renovation of all tenant spaces and most public spaces. Highly efficient LED lighting, high-performance building/lighting controls and thermal storage tanks to preserve building energy also will be installed.

Renovated in 2005, the adjacent federal courthouse will have its windows replaced with more energy-efficient products.

This high-performance sustainable building project will continue GSA’s legacy of outstanding public architecture. The team includes Mortenson Construction as design builder, Bennett Wagner & Grody Architects as architect of record, RMH Group for MEP engineering and Rocky Mountain Institute as high-performance building consultant.


LEED-NC Silver anticipated


620,000 million sq. ft. / 57,600 sq. m.


Interior Design
Sustainable Consulting


9 December 2012
“Renovation of Rogers Building Aims for High Energy Efficiency”
Denver Business Journal

1 October 2012
“Right Steps for Retrofits”
Engineered Systems Magazine