Most of the city's tallest buildings are office blocks constructed during the mid-20th century. However, since then many of these office blocks have become outdated, prompting a huge redevelopment programme for the town centre, called Croydon Vision 2020. The town has since witnessed a boom in the construction of high rise apartments, such as IYLO and Altitude 25, a former brownfield site. In contrast to the vast majority of London's tallest buildings, Croydon's high-rises were constructed in the 1960s and 70s as part of a project to create the South of England's largest office space outside of Central London. Some of the early high-rise buildings have subsequently been demolished themselves, such as Wettern House to allow for new skyscrapers to be constructed.
The list includes the year of completion for completed buildings, the height in metres and feet, and the current usage of the building. Similar to cities across the globe, Croydon's tallest structures are mostly concentrated in a central business district, which has added to the fact that many tourists enjoy Croydon because it is compact, especially those from far eastern countries including Japan. The tallest building in Croydon was until recently No. 1 Croydon (formerly the NLA Tower), a high-rise office block, which was completed in 1970 and retained the crown of Croydon's tallest building until 2009, when Altitude 25, a residential high-rise complex, was completed. No. 1 Croydon has 24 storeys and 82 metres (269 ft) high and consists of the offices of AIG, Liberata, Pegasus and the Institute of Public Finance. It is still in "Britain's 100 tallest towers" list,  The largest skyscraper proposed for the town is Wellesley Square which will stand at 149 metres (489 ft). The oldest structure listed is Croydon Parish Church. It was completed in 1876 but the first mention of a church on the site was in the Domesday Book of 1086.
The two tallest structures, as of the beginning of 2008, in Croydon are listed below. Structures which have been demolished are not included. A structure differs from a high-rise by its lack of floors and habitability.