3083 Walnut Street

3083 Walnut Street is a tech-forward, mixed-use building located in Denver’s revitalized River North Art (RiNo) District. Once an industrial zone, the district now stands as a vibrant community hub, making it the perfect setting for this office building, designed for connection, innovation and sustainability.

Meeting the Demand for a Live, Work, Play Environment

Designed in partnership with Colorado-based Open Studio Architecture and developed and built by Mortenson, the four-story, 65,000-square-foot addresses the demand for a live, work, play environment. RiNo, known for its rich art and entertainment scene and “foodie” culture, was ready to incorporate more businesses into its community fold. 3083 Walnut combines Class A office space, ground-floor retail and a 95-stall parking garage to deliver an office product complementary to the Denver lifestyle, with increasing market demand. With amenities like private outdoor patios and an accessible bike storage room, tenants can enjoy all the Mile High City has to offer.

Pushing the Boundaries of Sustainable Design 

3083 Walnut was designed and built with energy-efficient technologies and sustainable practices to significantly reduce the building's environmental impact:

• 45% reduction in carbon footprint: 3083 Walnut emits 45% less carbon dioxide (CO₂) compared to a standard building of similar size and function. 
• 36% efficiency improvement over local ordinance requirements: 3083 Walnut’s energy systems are more efficient than those mandated by local regulations. This results in better performance in heating, cooling, and overall energy use, leading to lower energy consumption and costs. 

A Collaborative Effort and Work of Art for the Community

Delivering an innovative building required a collaborative effort from the start. Through an Integrated Project Delivery (IPD) methodology, 3083 Walnut united the entire project team (architects, engineers, and contractors) from the beginning to streamline workflows, identify efficiencies early, and ensure the highest quality building. Implementing Virtual Design and Construction (VDC) technology throughout the process prevented potential issues and ensured the project was delivered on time and within budget.

3083 Walnut’s beauty is anchored by a custom mural on the enclosure, created by renowned Colorado artist, Pat Milbery, that intertwines the state’s natural landscape with Mortenson’s commitment to build a better world – weaving artistic messaging focused on sustainability, innovation and community.

Identifying Efficiencies 

With urban construction, projects like this are often faced with unique challenges such as tight sites and the potential for disruption to surrounding residents and businesses. To address these challenges, the team leveraged BLUvera’s prefabricated exterior wall panels to minimize onsite traffic congestion. Manufactured off-site in a controlled factory, 275 panels were delivered to the site and quickly installed, reducing the need for specialized equipment, ultimately enhancing safety on and around the site and saving costs for specialized equipment.

Mortenson further enhanced efficiency during construction by self-performing 40% of the building's construction, including concrete work, rough carpentry, drywall, and exterior panel installation.

Building Our Home

The new building is more than just a workspace—it’s a hub for over 300 professionals and a home base for Mortenson’s growing presence across key sectors including sports, renewable energy, federal projects, and data centers.