Manhattan West is a 5.4-million-square-foot (500,000 m2) mixed-use development by Brookfield Properties, being built as part of the Hudson Yards Redevelopment. The project consists of two large office towers and two smaller residential towers, as well as a 1.5-acre (0.6-hectare) public park. The towers are being built on a platform over Penn Station storage tracks along Ninth Avenue. The buildings are close to the Hudson Yards mega-development to the west across Tenth Avenue. Upon its completion, the taller west tower will extend 995 feet (303 m) up to its roof and will be one of the tallest buildings in New York City.