The affordability of housing in the UK reflects the ability to rent or buy property. There are various ways to determine or estimate housing affordability. One commonly used metric is the median housing affordability ratio; this compares the median price paid for residential property to the median gross annual earnings for full-time workers. According to official government statistics, housing affordability worsened between 2020 and 2021, and since 1997 housing affordability has worsened overall, especially in London. The most affordable local authorities in 2021 were in the North West, Wales, Yorkshire and The Humber, West Midlands and North East.

Housing in the United Kingdom represents the largest non-financial asset class in the UK; its overall net value passed the £5 trillion mark in 2014. Housing includes modern and traditional styles. About 30% of homes are owned outright by their occupants, and a further 40% are owner-occupied on a mortgage. About 18% are social housing of some kind, and the remaining 12% are privately rented.