One Pacific Square

Planning for the structure began in 1974, with construction beginning in July 1981, with plans for completion in December 1982 for the $23-million project.^[4] It had received a height variance for the neighborhood, as it was to be 14-stories and 188-foot (57 m) tall.^[5] The building was designed by architect Richard A. Campbell,^[6] developed by Hayden Corp.,^[7] and built by general contractor H.A. Andersen (now Andersen Construction Co).^[8] It was to be part of a four-building complex of similar towers, one to be 20 stories, one at 27 stories, and the tallest at 28 stories.^[9] A dedication ceremony was held on April 8, 1982 for the building, at which time a time capsule was buried.^[10] It topped out in June 1982.^[11] One Pacific opened on April 1, 1983,^[12] with an opening ceremony on July 11, 1983, and at that time NW Natural leased approximately 55 percent of the building.^[13]

One Pacific was sold in 1997 for $33 million to Equity Office Properties Trust, and then sold for $48 million to Ashforth-Pacific Inc. in August 2006.^[14][15] The building attained Energy Star certification in 2007.^[16] Menlo Equities purchased the property in 2015 for $48.5 million.^[17] In 2017, NW Natural announced plans to move out when the company's lease expires in 2020,^[18][19] after using the building as its headquarters for 30 years.^[20] NW Natural then moved in 2020 to 250 Taylor in Downtown.^[21] Owner Menlo sold the tower for $52.1 million in 2018.^[17]

The eight-sided tower is crystal-shaped, with the upper floors at a 45-degree angle.^[9] Standing 13-stories, it occupies the entire block bounded by Davis, Everett, First, and Second in Northwest Portland.^[9] The building contains 230,000 square feet (21,000 m²) of space inside a glass envelope.^[9]