List of tallest buildings and structures in London

London is the capital and largest city of the United Kingdom. It has 133 completed buildings that are at least 100 metres (328 feet) tall as of 2026, 42 of which have a height greater than 150 metres (492 ft). London has one of the largest skylines in Europe; it has the most skyscrapers taller than 150 m (492 ft) in the United Kingdom and in Western Europe, and the third most of any city in Europe overall, after Moscow and Istanbul. London's skyline has undergone immense transformation in the early 21st century. Since 2013, the tallest building in London and the United Kingdom has been The Shard, London's only supertall skyscraper. The pyramid-shaped building in Southwark rises to a height of 306 m (1,004 ft). London has two primary skyscraper clusters: the City of London in central London, and Canary Wharf with the Isle of Dogs in East London, alongside numerous smaller groupings throughout Greater London.

For two centuries since 1710, St Paul's Cathedral was the tallest structure in London. While early skyscrapers sprouted in the late 19th and early 20th century in the United States, London—then the world's largest city—avoided this trend. In 1894, after work on the 12-storey Queen Anne’s Mansions, the London Building Act imposed a height limit of 30 m (98 ft) or less across the city. This restriction was lifted in the 1950s, permitting the construction of high-rises taller than St. Paul's. The destruction during The Blitz allowed more room for modern development. Early skyscrapers were built on the west side of central London, most notably the BT Tower in Fitzrovia in 1965. A concentration of tall buildings arose in the City of London, including office towers such as St Helen's and Tower 42, and Barbican Estate, a three-towered residential complex that is a prominent example of brutalism. The London Docklands in the Isle of Dogs, which had become disused in the 1960s, underwent a significant redevelopment plan in the 1980s, resulting in the financial district of Canary Wharf. Among the first skyscrapers built there was One Canada Square in 1991. At 236 m (774 ft), it surpassed Tower 42 to be London's tallest building; it is currently the city's third-tallest building and still the tallest in Canary Wharf.

Since the 2000s, London has been experiencing a substantial skyscraper boom, which has accelerated in the late 2010s. This initially took place mostly in the City of London and Canary Wharf. The Gherkin, completed in 2004 in the City, is a recognised example of contemporary architecture. Further office skyscrapers in the City of London, such as 20 Fenchurch Street and 122 Leadenhall Street, have been given nicknames due to their distinctive shapes. The City of London's tallest building, 22 Bishopsgate, initially broke ground under the name The Pinnacle in 2008, but construction was halted in 2012. After a redesign, which removed the proposed curved-glass roof, it was completed in 2020. Numerous skyscrapers are planned for the City, including 1 Undershaft, which would be the tallest in the district, owing to high demand for grade-A office space. Canary Wharf has seen a major influx in residential skyscrapers since the 2010s, with the Wood Wharf neighbourhood expanding the skyscraper cluster eastwards.

High-rises have increasingly proliferated across London since the 2010s, particularly in the areas of Vauxhall/Nine Elms, Elephant and Castle, and Stratford. The tallest buildings in each area (One Nine Elms City Tower, Highpoint, and Manhattan Loft Gardens respectively) have been built since 2018. This has been associated with residential regeneration efforts; in Stratford, development was spurred by the 2012 Summer Olympics. The New London Vernacular has influenced the design of these new towers. In the late 2010s and 2020s, this has extended to more areas across inner and outer London, most notably in Lewisham, Croydon, North Acton, and Wembley Park. One Blackfriars, completed in 2019 in the South Bank, will be accompanied by skyscrapers in the Bankside Yards project. Considerable residential high-rise development has also occurred in Barking, Blackwall, Canada Water, Canning Town, Greenwich Peninsula, Paddington, Poplar, Shoreditch, Silvertown, Southwark, Wandsworth, White City, and along City Road.