One River North

The defining move at One River North is a 10-story gash carved into the glass facade of a 16-story Denver apartment building. It’s MAD Architects’ first completed project in North America, and the canyon-through-the-tower is exactly what the renderings promised in 2021. From across the railyard, the building reads as a sheer rectangular volume with a vertical landscape running up its face. From the sidewalk, the gash resolves into a series of stepped, landscaped terraces that residents can walk through.

Project Scope

One River North contains 187 rental apartments across 16 stories on a roughly 350,000 sq ft footprint at 3930 Blake Street, in Denver’s River North Art District. The ground plane holds 9,000 square feet of retail. The signature canyon is more than a visual gesture: over 1,000 square meters of accessible terraces are stitched into the cut, with native plantings, walking paths, fitness terraces and a rooftop pool deck that all connect through the carved volume. Inside, unit mixes run from studios up to three-bedroom layouts, with several penthouse units that open directly onto the upper canyon terraces.

The design team is hybrid. Ma Yansong’s MAD Architects led the design, with Denver’s Davis Partnership Architects serving as architect of record and managing the executional drawings. Jirsa Hedrick handled structural engineering, including the complex cantilevers required to hold the planted terraces in place without compromising the floor plates. Saunders Construction was the general contractor on a roughly $130 million budget. Groundbreaking happened in October 2021, with topping out in early 2023 and resident move-in starting April 2024.

Why It Matters

One River North is one of the few multifamily projects in the U.S. where the architectural design directly drives the leasing pro forma. The canyon isn’t an applied skin. It’s a 10-story void cut into the building’s habitable area, which trades sellable square footage for amenity and identity. Pre-leasing rates outran the rest of the RiNo submarket in 2024, and rents have run a meaningful premium against comparable new construction in the district.

The project also tests whether biophilic design at residential scale survives the value-engineering pass. MAD has cited One River North as the model it wants to repeat in U.S. cities. Several other developers have explored similar concepts, but few have actually built one. The fact that Denver got there first, on a private balance sheet rather than a subsidized one, is the part the rest of the multifamily industry is watching.

Project Team & Details