The Commonwealth Building is a 14-story, commercial office tower in

Portland, Oregon Portland ( ) is the List of cities in Oregon, most populous city in the U.S. state of Oregon, located in the Pacific Northwest region. Situated close to northwest Oregon at the confluence of the Willamette River, Willamette and Columbia River, ...

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

. Located at 421 SW 6th Avenue between Washington and Harvey Milk Streets, it was designed by

architect An architect is a person who plans, designs, and oversees the construction of buildings. To practice architecture means to provide services in connection with the design of buildings and the space within the site surrounding the buildings that h ...

Pietro Belluschi Pietro Belluschi (August 18, 1899 – February 14, 1994) was an Italian-American architect. A leading figure in modern architecture, he was responsible for the design of over 1,000 buildings.Belluschi, Pietro. (2007). In ''Encyclopædia Britanni ...

and built between 1944 and 1948. The building was originally known as the Equitable Building and is noted as one of the first glass box towers ever built, pioneering many modern features and predating the more famous Lever House in

New York City New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive w ...

History

Construction on the building began in 1944, with it opening in 1948 as the Equitable Building. The building, which was built as the headquarters in Portland of the Equitable Savings and Loan Association, was originally intended to be 12 stories high but was later expanded to 14. It was the first tower to be sheathed in

aluminum Aluminium (or aluminum in North American English) is a chemical element; it has chemical symbol, symbol Al and atomic number 13. It has a density lower than that of other common metals, about one-third that of steel. Aluminium has ...

, the first to use double-glazed window panels, and was the first to be completely sealed and fully air-conditioned. In 1965, the building was renamed as the Commonwealth Building when the Equitable Center (now Unitus Plaza) opened, which was also designed by Pietro Belluschi. The Commonwealth Building was added to the

National Register of Historic Places The National Register of Historic Places (NRHP) is the Federal government of the United States, United States federal government's official United States National Register of Historic Places listings, list of sites, buildings, structures, Hist ...

(as the Equitable Building) in 1976. In 1980, the

American Society of Mechanical Engineers The American Society of Mechanical Engineers (ASME) is an American professional association that, in its own words, "promotes the art, science, and practice of multidisciplinary engineering and allied sciences around the globe" via "continuing edu ...

(ASME) designated the Commonwealth Building as a National Historic Mechanical Engineering Landmark.Equitable Building Heat Pump (1948)
from asme.org In 1982, the building was the recipient of the Twenty-five Year Award, of the

American Institute of Architects The American Institute of Architects (AIA) is a professional organization for architects in the United States. It is headquartered in Washington, D.C. AIA offers education, government advocacy, community redevelopment, and public outreach progr ...

. In 1993, Weston Investment Co. LLC bought the building for $1.9 million. Unico Properties and Cigna Realty Investors bought the building in 2007 from Weston for $27 million, and spent $7 million more on renovations to the structure. The building was sold again by Unico in 2013 for $41 million when Unico bought out Cigna. Unico sold the tower to KBS in 2016 for $69 million.

Features

, the tower is of the

International Style The International Style is a major architectural style and movement that began in western Europe in the 1920s and dominated modern architecture until the 1970s. It is defined by strict adherence to Functionalism (architecture), functional and Fo ...

. The 14-story, -tall glass box tower is constructed of sea-green

glass Glass is an amorphous (non-crystalline solid, non-crystalline) solid. Because it is often transparency and translucency, transparent and chemically inert, glass has found widespread practical, technological, and decorative use in window pane ...

and is sheathed in

Designations and awards

The building is listed on the

, and is also designated as a National Historic Mechanical Engineering Landmark by the ASME. The ASME History & Heritage Committee bestowed this landmark status for the specific feature: the first large commercial building in the United States to pioneer the use of

heat pumps A heat pump is a device that uses electricity to transfer heat from a colder place to a warmer place. Specifically, the heat pump transfers thermal energy using a heat pump and refrigeration cycle, cooling the cool space and warming the warm s ...

for heating and cooling.

References

External links

*
Great Buildings Online: The Equitable BuildingBuilding Oregon: Equitable Building
{{Portal bar, Architecture, National Register of Historic Places, Oregon Skyscraper office buildings in Portland, Oregon Pietro Belluschi buildings National Register of Historic Places in Portland, Oregon Office buildings completed in 1948 1948 establishments in Oregon Buildings and structures in Southwest Portland, Oregon Portland Historic Landmarks

History

Features

Designations and awards

See also

References

External links