The Triangle Building

Transforming a challenging urban site into a landmark office tower that defines Denver’s evolving skyline.

Located along Denver’s 16th Street Mall and immediately adjacent to Union Station, the Triangle Building is a 250,000-square-foot Class A office development that occupies one of the city’s most prominent transit-oriented locations. Rising from a compact triangular parcel, the building’s distinctive form creates a recognizable architectural landmark while maximizing the value and functionality of a challenging urban site.

The development includes approximately 212,000 square feet of office space across floors two through ten, complemented by 15,000 square feet of ground-floor retail that activates the surrounding streetscape. Two levels of underground parking provide convenient access for tenants and visitors while preserving the pedestrian character of the site.

A key component of the project was the creation of Wewatta Plaza, a public plaza and walkway that strengthens the connection between Union Station and the surrounding downtown destinations. This public realm enhancement reinforces the building’s role as an important gateway within Denver’s urban core.

The building’s unique triangular geometry and extensive curtain wall system provide approximately 20 percent more window offices than a conventional office building, maximizing daylight, views, and occupant experience. Architecturally, the structure presents the appearance of a continuous glass volume resting atop a bold, angular base, creating a striking visual presence from every approach.

Sustainability and support for the regional economy were integral to the project’s execution. The building utilized locally sourced steel and cement whenever possible, while significant quantities of steel, wood, and gypsum were recycled throughout construction. Saunders also self-performed all concrete work, placing more than 13,000 cubic yards of concrete across foundations, caissons, cores, decks, slabs, curbs, and site elements.

The result is a signature downtown landmark that combines innovative design, sustainable construction practices, and a strong connection to Denver’s transit network, helping shape the identity of one of the city’s most dynamic districts.

This project received multiple industry awards, including:

• 2019 ColoradoBIZ Editor’s Choice Award from AIA Colorado Design + Honor Awards
• 2017 Distinctive Denver Award from Denver Mayor’s Design Awards
• 2017 Transformational Project Award from Downtown Denver Partnership Awards
• LEED Gold Certification, 2015