Madison Centre in October 2017
|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 eleventh-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.
- Rosenberg, Mike (March 10, 2017). "Record construction frenzy sweeps downtown Seattle; more building to come". The Seattle Times. Retrieved March 27, 2017.
- "Schnitzer West, Madison Centre: Business Nexus". NBBJ. Retrieved May 16, 2016.
- Madison Centre at Emporis
- Miller, Brian (October 23, 2017). "Madison Centre opens, with 70% of the office space still available". Seattle Daily Journal of Commerce. Retrieved October 24, 2017. (Subscription required (. ))
- James, Andrea (March 14, 2007). "More office space at College Club site". Seattle Post-Intelligencer. Retrieved March 29, 2012.
- Shevory, Kristina (October 21, 2008). "Even in Resilient Seattle, Office Vacancy Rate Is Rising". The New York Times. Retrieved March 29, 2012.
- Porter, Lynn (November 10, 2008). "Seattle commercial real estate players: 'We're not immune'". Seattle Daily Journal of Commerce. Retrieved March 29, 2012.
- Holden, Dominic (April 7, 2009). "Re: Boom Forever". SLOG. Retrieved March 29, 2012.
- Pryne, Eric (April 25, 2012). "Schnitzer West revives plan for 36-story office tower downtown". The Seattle Times. Retrieved March 29, 2012.
- Levy, Nat (August 22, 2014). "Schnitzer West getting ready to start Madison Centre". Seattle Daily Journal of Commerce. Retrieved July 7, 2016. (Subscription required (. ))
- "Cornerstone joins Madison Centre JV". Seattle Daily Journal of Commerce. February 17, 2016. Retrieved July 7, 2016.
- Mitanis, Marcus (October 6, 2016). "Two Highrise Office Projects Top Out in Seattle". Skyrise Cities. Retrieved November 6, 2017.