Tour Triangle . Image Courtesy of Herzog & de Meuron
The city of Paris has officially reinstated a rule that limits the height of new buildings in the French capital to 37 meters, or 12 storeys. Among the factors for the decision was the controversy surrounding the construction of the 180-meter-tall Tour Triangle, designed by Herzog & de Meuron, which began in 2021 after more than a decade of legal battles and backlash. The new urban planning regulation is introduced as part of Mayor Anne Hidalgo's Local Bioclimatic Urban Plan, which aims to reduce Paris' carbon emissions.
How do we determine the actual height of a building? Where do we place the dimension line? The history of measuring skyscrapers dates back to 1885, way before AutoCAD or Revit dimensions, when the Home Insurance Building in Chicago was among the first to boast of being the world's tallest building, but the Council on Tall Buildings and Urban Habitat (CTBUH)—or the Joint Committee on Tall Buildings, as it was originally called—wasn’t formed until 1969. Recognized by many as the foremost authority on tall buildings, the CTBUH is often cited in determining the world’s (or country’s or city’s) tallest building. However, the CTBUH is not the only organization with a stake in measuring buildings; the global building information database Emporis is also a major player. Between them, these two organizations provide 10 different ways to determine a skyscraper's height, which we have summarized below.
