In September 2024’s release, UK House Price Index (UK HPI) estimates were revised from January 2022 onwards by making use of price data processed outside the UK HPI’s normal 12-month revision period. In October 2024’s release, UK HPI returned to the usual 12-month revision period. Users should be aware that revisions may be larger than usual and should note the significantly greater uncertainty around new build prices. Previously, UK HPI had a reference period of January 2015. In February 2025’s release, UK HPI’s reference period was updated to January 2023, so UK HPI indices now report January 2023 equals 100. ... (full story)