505 Madison
 Madison Centre formerly known as M5 Commerce Centre is a 550-foot (170 m) tall skyscraper planned for the Downtown district in Seattle Washington. It is scheduled to be completed in 2015 and have 36 floors. Upon its completion it would be one of the tallest buildings in Seattle. Schnitzer West bought the existing property at the site and hoped to begin construction of a skyscraper as early as 2008.