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Next publication of UK HPI
The October 2021 UK HPI will be published at 9.30am on Wednesday 15 December 2021. See the calendar of release dates for more information.
Northern Ireland sales volumes
We’ve changed the way we publish the Northern Ireland sales volumes and corrected the way we include them in the UK figures. We’ve produced a monthly estimate by dividing the total sales volumes for the quarter in Northern Ireland by 3.
We previously included the quarterly Northern Ireland data in the monthly UK sales volumes data, which resulted in higher than expected sales figures.
Methodology change for new build property
Because of the impact of the coronavirus (COVID-19) pandemic on both the number and supply of housing transactions, some methodology changes have been made. The processing of new build properties has been more affected than the processing of “old build” properties. So, to address this, we have had to pool new build transactions for certain months:
January 2021 includes new build transactions from December 2020 and January 2021 for England and Wales.
February 2021 includes new build transactions from January 2021, and February 2021 for England and Wales.
March 2021 includes new build transactions from February and March 2021 for England and Wales.
April 2021 includes new build transactions from March and April 2021 for England and Wales.
May 2021 includes new build transactions from April and May 2021.
June 2021 includes new build transactions from May and June 2021.
July 2021 includes new build transactions from June and July 2021.
August 2021 includes new build transactions from July and August 2021.
Because of the nature of the processing of the new builds, these are never included in the model for the first estimate, so September 2021 has not been affected.
These changes might lead to larger revisions to published estimates than usual as we reduce the reliance on pooling. Further information on how we usually process the new build properties can be found in the Quality and Methodology documentation.
See data downloads to download the data in CSV format.