Four Seasons Hotel and Private Residences Denver is a 565 feet tall skyscraper in Denver, Colorado. This makes it the 4th tallest building in Denver. It was completed in 2010 and has 45 stories and 766,487 sq ft of usable floor space. It is estimated to cost $350 million, or $456.63 per sq. ft., which would make it the most expensive privately owned building ever constructed in Denver. It is a mixed-used building, containing a pool, fitness center and amenities.