Seattle, Washington, the most populous city in the Pacific Northwest region of the United States, has 154 completed high-rise buildings over 160 feet (49 m), of which 32 are over 400 feet (120 m) tall. An additional 65 high-rise buildings are under construction or undergoing planning and design review, as of 2016[update].
The tallest building in Seattle is the 76-story Columbia Center, which rises 937 feet (286 m) and was completed in 1985. It is currently the 24th-tallest building in the United States, and the tallest building in the state of Washington. The second-tallest skyscraper in the city and the state is 1201 Third Avenue, which rises 772 feet (235 m) and was completed in 1988. The 20 tallest buildings in Washington are all located in Seattle.
In terms of the number of skyscrapers over 493 feet (150 m), Seattle's skyline is ranked first in the Northwestern United States, third on the West Coast (after Los Angeles and San Francisco) and tenth in the United States.
After the Great Seattle Fire of June 6, 1889, Seattle began reconstruction of the city's central business district under a new building code requiring the use of fireproof materials, such as stone and brick. By the end of 1890, 465 buildings had been built, completing the initial phase of reconstruction, and city boosters looked to build modern high-rise buildings after the infusion of new money from the Klondike gold rush later that decade. The Pioneer Building, whose observation tower surpassed 110 feet (34 m), was completed in 1892 and is regarded as the city's first modern high-rise building. The Alaska Building, completed in 1904 and rising 203 feet (62 m) above 2nd Avenue in Pioneer Square, is considered to be Seattle's first skyscraper and first steel-framed high-rise building. It held the title of tallest habitable building in the city until the completion of the 205-foot (62 m), 18-story Hoge Building in 1911. Both buildings had been surpassed in height by the clocktower of King Street Station, opened in 1906, which stands 245 feet (75 m) tall.