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How to Read UK House Price Data

Different indices measure different things.

How to Read UK House Price Data Residential Property Services in London

Updated October 2026 · Fraser Bond

Market · House prices

Reading house price data

ONS HPIcompleted sales
Lendersmortgage approvals
Rightmoveasking prices
Localmatters most
In short: Headline house price figures come from several sources. The official UK House Price Index (ONS and HM Land Registry) uses completed sales, so it's accurate but lags by a few months. Nationwide and Halifax use their own mortgage approvals and are more up to date. Rightmove reports asking prices, which show sellers' expectations. London varies hugely by borough and property type, so for your own home, recent sold prices nearby and a local valuation matter far more than national headlines.

Frequently asked questions

Which index is most accurate?

The ONS HPI, but it lags.

How do I value my home?

Sold prices nearby and a professional valuation.

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