The UK house price index (UK HPI) represents changes in the value of UK residential properties (i.e., detached houses, semi-detached houses, terraced houses, flats and maisonettes) and indicates trends in the UK housing market. The UK HPI applies a hedonic regression model that utilises the various sources of data on property price (e.g., HM Land Registry's Price Paid dataset) to allow for a true comparison of UK property prices in each period. The data is sourced from the Office for National Statistics (ONS) and HM Land Registry, using house sales data from HM Land Registry, Registers of Scotland, and Land and Property Services Northern Ireland. Forecast data is estimated by IBISWorld, with reference to Office for Budget Responsibility (OBR) forecasts submitted in its 'Economic and fiscal outlook – March 2022' publication. The figures are presented with a base month in 2015 (i.e., January 2015 = 100) and are averages of the UK HPI over each financial year (i.e., April-March).

This report analyses the number of residential property transactions in the United Kingdom during each financial year (i.e., April-March). The data is sourced from Her Majesty's Revenue and Customs (HMRC), whereby figures for the number of property transaction completions with a value of £40,000 or above are based on the HMRC Stamp Duty Land Tax (SDLT) database, which records information submitted by property purchasers on SDLT returns. HMRC data in this report is seasonally adjusted estimates of UK aggregated transactions figures. Where HMRC data for 2021-22 is a provisional estimate at the time of publication (28 April 2022), data in 2022-23 and the years succeeding is forecast with reference to, and consideration of, both provisional monthly estimates afforded by HMRC and forecast property transactions data provided by the Office for Budget Responsibility (OBR).