1144 Fifteenth Street

Denver, CO, United States

The tallest office tower built in Denver in 35 years features floor-to-ceiling windows for sweeping views of the Rocky Mountains

The $300 million, 40-story, 663,000 SF office tower is comprised of 27 floors of Class A office space on top of a 13-story podium that includes a 5,000 SF fitness center, a tenant lounge, restaurants, and a parking garage with 880 spaces. The project features enhanced air filtration and superior energy efficiency. LEED Gold certified.


  • Electrical Engineering
  • Mechanical Engineering
  • Plumbing


  • NAIOP 2018 Awards of Achievement, Office Development of the Year
  • 2018 Downtown Denver Award, Downtown Denver Partnership