Mortenson Denver Office rendering
3083 Walnut Street / DenverCO
The new home of Mortenson Denver.

Mortenson is underway on the development and construction of a new four-story, 65,000 square foot mixed-use building in Denver’s River North Art District (RiNo). The project includes three floors of Class A office space, ground floor retail and a 95-stall parking garage with two levels below-grade.

The site, previously a parking lot, offers close proximity to downtown and walkability to the surrounding area’s retail hub. Mortenson will occupy approximately 37,000 square feet and lease out the remaining space to third-party tenants.

Mortenson partnered with Open Studio Architecture on this design-build project. The design is intended to blend in with the existing industrial aesthetic of the neighborhood and will feature murals painted by local Colorado artists. Amenities include private outdoor patio spaces, an accessible bike storage room and state-of-the-art HVAC systems. 

Mortenson’s self-performed services on the project will include concrete, rough carpentry and drywall. Mortenson is also leveraging its controlled off-site manufacturing environment to produce and install prefabricated wall panels. Incorporating efficient energy systems, from lighting design to glazing and embodied carbon modeling, the building will exceed requirements set by Denver’s Green Building Ordinance. 

The new building will provide space for more than 300 locally focused professionals as well as other Mortenson divisions that have not historically had a Denver presence, such as the company’s sports, renewable energies, data centers and federal contracts teams. Additionally, Mortenson plans to lease out the ground floor to retail tenants that will contribute to the vibrancy of the neighborhood.

“Mortenson has been here for more than four decades now, but this is our first ground-up home, which is a big deal for us as builders,” said Brian Fitzpatrick, vice president and general manager of Mortenson Denver. “The energy here in RiNo is incredible – this is not only where our people want to work, we know this is where they want to spend time outside of the office. Prioritizing our team’s happiness and well-being is central to our attraction and retention strategy, and this new space and location reflect our commitment to continuing to be the best place to work in Denver.”

Construction completion and move-in is slated for the fourth quarter of 2024.

Facts And Figures

65,000 Square Feet
Completion: 2024

Delivery Methods

Develop Design-Build

The Team