|Former names||M5 Commerce Centre, 505 Madison|
|Location||920 5th Avenue, Seattle, Washington 98104|
|Roof||530 ft (160 m)|
|Floor area||746,000 sq ft (69,300 m2)|
|Design and construction|
|Structural engineer||DCI Engineers|
|Main contractor||Sellen Construction|
Madison Centre (formerly known as M5 Commerce Centre and 505 Madison) is a 530-foot-tall (160 m) skyscraper in Downtown Seattle, Washington. It was completed in October 2017 and has 37 floors of office space totaling 746,000 square feet (69,300 m2) of gross leasable area. It is the thirteenth-tallest building in Seattle. It is located at the intersection of 5th Avenue and Madison Street in Downtown Seattle, adjacent to the Seattle Central Library and William Kenzo Nakamura United States Courthouse.
Schnitzer West bought the existing property from the College Club of Seattle in 2007 and hoped to begin construction of a skyscraper as early as 2008. In the meantime, however, the late-2000s recession struck the economy and consequently the fate of many commercial real estate projects came under doubt, including 505 Madison. Further development of the project hinged on securing a sufficient number of preleases by 2009, which did not occur.
In February 2016, Cornerstone Real Estate Advisers (now Barings) announced that it would enter a joint venture with Schnitzer West to develop Madison Centre. Construction on the tower topped out in October 2016, and the tower opened for occupancy in October 2017.
The retail space facing Marion Street was leased to Amazon Go, the second store for the cashier-less convenience store. It opened on August 27, 2018. Hulu signed a major lease for 67,400 square feet (6,260 m2) within the building in April 2019.
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