photo © James Ewing | OTTO One World Trade Center was among four global regional winners in the Council on Tall Buildings and the Urban Habitat's 15th-annual Best Tall Buildings award.

Today, the Council on Tall Buildings and Urban Habitat (CTBUH) named the four regional winners and 13 finalists in its Best Tall Buildings Award. Held annually since 2007, the competition recognizes tall buildings—measuring 50 meters or more in height and with at least half of that height occupied by usable floor area. To be considered for this year's program, the projects had to be completed between Jan. 1, 2014 and April 20, 2015, and be defined by sustainable construction and systems as well as features that enhance the lives of their occupants and those in the surrounding urban environment.

Paolo Rosselli Bosco Verticale, Milan

Selected from a pool of 123 entries representing 33 countries, the winners and finalists boast integrated green walls and gardens as well as sculptural forms that help the multi-story structures blend into the urban fabric. 

The four regional winners are: Skidmore, Owings, and Merrill's One World Trade Center, New York (Americas); Toyo Ito and Associates' CapitaGreen, Singapore (Asia and Australia); Stefano Boeri Architetti's Bosco Verticale, Milan (Europe); and Foster + Partners' Burj Mohammed Bin Rashid Tower, Abu Dhabi, United Arab Emirates (Middle East and Africa).

Foster+Partners Burj Mohammed Bin Rashid Tower, in Abu Dhabi

The CTBUH will name an overall winner on Nov. 12 during its 14th Annual Awards Symposium at the Illinois Institute of Technology, in Chicago.

CapitaLand Limited CapitaGreen, Singapore

Learn more about these and other new projects in ARCHITECT's Project Gallery.

Editor's note: This article has been updated to clarify that the Best Tall Buildings competition has been held annually since 2007. We regret the error.