1800 Larimer Office Building lobby
1800 Larimer Office Building Construction / DenverCO

The 22-story, 500,000 square foot of Class AA office, built as a glass and steel tower, 1800 Larimer is the first major high-rise office building completed in Denver’s central business district since the mid-1980s. It is also the first LEED Platinum-certified high-rise in Denver. The building’s primary tenant, Xcel Energy, occupies 350,000 square feet. The building features state-of-the-art underfloor air distribution systems for greater employee health and comfort, a 17,000 square foot landscaped green roof over the garage, a tenant fitness center, a hotel-style conference facility, floor-to-ceiling Low-E, insulating glass that provides substantial light for day-lighting; 9 ½ foot ceiling heights, and advanced engineering systems that create and monitor a high-quality indoor environment.

The green roof contributes to a reduction of the heat island effect for the site and reintroduces a significant percentage of open space and habitat to the site via native plantings. Part of the structure below the green roof holds 100-year-flood-level stormwater detention and water quality tank that greatly improves the site’s contribution to storm water quality, as well as providing non-potable irrigation water for the plantings on the terrace.

Facts And Figures

Westfield Development Company

Completed April 2010


500,000 square feet

Delivery Methods

Construction Manager at Risk

The Team



Downtown Denver Partnership Awards - Downtown Denver Partnership, Inc., 2011