Commonwealth Building, International Style high-rise building in downtown Portland, United States
Commonwealth Building is a 14-story commercial structure with a distinctive sea-green glass exterior and aluminum frame located at 421 SW 6th Avenue. The slim profile and smooth facade showcase the clean lines characteristic of International Style design.
Architect Pietro Belluschi designed the structure in 1948 as the Equitable Building. It became the first tower in the country to feature a full glass exterior, setting a new direction for commercial architecture.
The building marked a turning point in how cities could look, showing that glass and metal could define a modern commercial tower. Its design approach spread to office buildings across the country and changed what people expected from urban architecture.
The building sits in downtown Portland and is straightforward to find and access. A fitness center with shower facilities and basement bicycle storage offer practical conveniences for those visiting or working on-site.
The structure pioneered the use of heat pump technology for climate control, a groundbreaking system that was entirely new at the time. This early adoption of geothermal engineering was later honored as a significant mechanical engineering achievement.
The community of curious travelers
AroundUs brings together thousands of curated places, local tips, and hidden gems, enriched daily by 60,000 contributors worldwide.
