Topping out in the context of Tallest structures by category

One World Trade Center, also known as One WTC and as the Freedom Tower, is the main building of the rebuilt World Trade Center complex in Lower Manhattan, New York City. Designed by David Childs of Skidmore, Owings & Merrill, One World Trade Center is the tallest building in the United States, the tallest building in the Western Hemisphere, and the seventh-tallest in the world. The supertall structure has the same name as the North Tower of the original World Trade Center, which was destroyed in the terrorist attacks of September 11, 2001. The new skyscraper stands on the northwest corner of the 16-acre (6.5 ha) World Trade Center site, on the site of the original 6 World Trade Center. It is bounded by West Street to the west, Vesey Street to the north, Fulton Street to the south, and Washington Street to the east.

The construction of below-ground utility relocations, footings, and foundations for the new building began on April 27, 2006. One World Trade Center became the tallest structure in New York City on April 30, 2012, when it surpassed the height of the Empire State Building. The tower's steel structure was topped out on August 30, 2012. On May 10, 2013, the final component of the skyscraper's spire was installed, making the building, including its spire, reach a total height of 1,776 feet (541 m). Its height in feet is a deliberate reference to the year when the United States Declaration of Independence was signed. The building opened on November 3, 2014; the One World Observatory opened on May 29, 2015.

The Burj Khalifa (known as the Burj Dubai before its inauguration) is a megatall skyscraper in Dubai, United Arab Emirates. Designed by Skidmore, Owings & Merrill, it is the world's tallest structure, with a total height of 829.8 m (2,722 ft, or just over half a mile) and a roof height (excluding the antenna, but including a 242.6 m spire) of 828 m (2,717 ft). It has also been the tallest building in the world since its topping out in 2009, surpassing Taipei 101, which had held the record for a half-decade.

Construction of the Burj Khalifa began in 2004; the exterior was completed five years later. The primary structure is reinforced concrete. Some of the structural steel for the building was salvaged from the demolished Palace of the Republic in East Berlin. The building was opened in 2010 as part of a new development called Downtown Dubai. It was designed to be the centerpiece of large-scale, mixed-use development.

Tokyo is the most populated of Japan's 47 prefectures. Mainland Tokyo is divided into two sections: Western Tokyo and the special wards of Tokyo. The prefecture's tallest structures are within the 23 special wards, which comprise the area formerly incorporated as Tokyo City. As of May 2025, there are over 200 structures in Tokyo that stand at least 150 metres (490 ft) tall, of which 49 are at least 200 metres (660 ft) tall, including those that are still under construction but have been topped out. Most of these structures are buildings; however, there are other types of structures among the tallest in the prefecture, such as freestanding towers and incineration smokestacks.

The tallest structure in the prefecture is Tokyo Skytree, a megatall lattice tower that rises 634 metres (2,080 feet), which was completed in 2012. It also stands as the tallest structure in Japan, the tallest tower in the world, and the third-tallest freestanding structure in the world. The second-tallest structure in Tokyo is the 333-metre-tall (1,093-foot) Tokyo Tower, a lattice tower completed in 1958. The tallest building and third-tallest overall structure is the 325-metre-tall (1,066-foot) Azabudai Hills Mori JP Tower, completed in 2023 and being Tokyo's only supertall skyscraper. It is also the tallest building in Japan and the world's largest skyscraper by floor area. The second-tallest building and fourth-tallest structure is the 284-metre-tall (932-foot) Nihonbashi 1-Chōme Central District Redevelopment (tentative name), which is topped out and scheduled for completion in 2026. Including topped-out buildings, Tokyo is home to 17 of the 25 tallest freestanding structures and 18 of the 25 tallest buildings in Japan.

The Canton Tower (Chinese: 广州塔), formally Guangzhou TV Astronomical and Sightseeing Tower (Chinese: 广州电视台天文及观光塔), is a 600 m (1,969 ft)-tall multipurpose observation tower in the Haizhu District of Guangzhou (alternatively romanized as Canton). The tower was topped out in 2009 and it became operational on 29 September 2010 in time for the 2010 Asian Games. The tower briefly held the title of tallest tower in the world, replacing the CN Tower, before being surpassed by the Tokyo Skytree. It was the tallest structure in China prior to the topping out of the Shanghai Tower on 3 August 2013, and is now the second-tallest tower and the fifth-tallest freestanding structure in the world.

One Madison is a luxury residential condominium tower located on 23rd Street between Broadway and Park Avenue South, at the southern end of Madison Avenue, across from Madison Square Park in the Flatiron District of Manhattan, New York City. The building's official address and main lobby entrance is at 23 East 22nd Street, rather than at 1 Madison Avenue; there is no public entrance on 23rd Street.

The building as constructed has 51 residential units across 60 stories. Construction started in 2006, and it topped out during 2010, but it remained incomplete for another three years due to financial difficulties. At a height of 621 feet (189.3 m), One Madison is one of the slenderest buildings in the world, with a height-to-width ratio of 12:1.