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The first project within the OMSI District has a green light. The Portland Design Commission on Thursday approved the design of a five-story, 100-unit affordable housing development, Los Colibris, on tract A of the Oregon Museum of Science and Industry campus.

Holst Architecture designed the approximately 86,500-square-foot building planned at 1701 S.E. Water Ave. The project is being developed by Hacienda CDC and Edlen & Co. OMSI is the landowner. The project team also includes civil engineer KPFF, landscape architect PLACE, and Colas Construction.

Portland Permitting & Development values the project at $36 million. No specific construction schedule exists at this time, Holst Architecture principal and owner Dave Otte stated in an email. The project team will next look to secure funding.

Previously, the project team received design advice during a hearing in November 2025.

The site’s primary challenge is its location adjacent to Interstate 5. A large, multiuse courtyard on the east side faces away from the freeway to give residents a space shielded from traffic noise, the project’s narrative states.

Landscaping will be intense closer to the building, Holst Architecture senior associate Dustin Furseth said, adding that color will also be a key component.

鈥淲e think something bright and colorful next to OMSI adds to the beauty of that area,鈥� he said.

The building’s name, Los Colibris (鈥淭he Hummingbirds鈥�), ties into the design, Furseth said.

鈥淗ummingbirds have a neutral palette often with highlights of color, which I think is a nice way of thinking about how to add color and vibrancy to a project,鈥� he said.

Overall, the building will have a neutral color with hints of color at the windows and more vibrancy on the massing at the courtyard and entry.

Building materials will include primarily fiber cement with options for texture and paneled direction. Metal panels might have deeper texture folding like chevrons able to reflect color, Furseth said. The design team is exploring custom accent colors for fiber cement.

Layers of glazing are planned at the front entrance and the community room.

The roof will hold heat pumps and mini splits. Most of the rooftop equipment will be relatively low in sightlines, Furseth said.

Commissioner Brian McCarter added that he’d like to see a buffer around the children’s play area.

The commission’s approval came with five design modifications and 12 master plan amendments. One condition requires a landscape buffer of at least 10 feet maintained for the length of the building’s south elevation, at the northern side of the western half of the Bull Run pathway. Alternative configurations would be considered through a staff-level type II design review. This will preserve existing trees to screen the ground-floor units as the Bull Run pathway develops.

Modifications were approved for zoning code standards. These include providing approximately 57.5 percent of frontage and a wide courtyard to create active public space, creating an arcade along the east fa莽ade, modifying window standards and uses on the ground floor, and using 50 percent of the roof area for solar panels.

Master plan amendments include changing the timeline of development of open space 2, reducing the extent of the Bull Run improvements associated with tract A, removing the 20-foot building setback above 50 feet in height for tract A, removing the building pass-through at tract A and shifting vehicle access to the north, relocating the private wastewater treatment plant to a location to be determined, delaying provision of the OMSI identity framework, transferring 2,000 square feet of floor area to tract A from other tracts, removing the building line requirement from the north side of tract A, reducing the ground floor height requirement for tract A, and adjusting the Southeast Old Water Avenue right of way.

The wastewater treatment plant will likely be relocated to the south on tract A or tract F, according to OMSI.

Artwork will be included in the project; OMSI plans to be involved in the process.