The Nationwide House Price Index

 The information in this guide was last updated on 24/07/2014

Our regular survey of house prices across the UK gives a detailed snapshot of the housing market, and can help you estimate the value of your home.

Nationwide house prices are mix adjusted - i.e. we track a representative house price over time rather than the simple average price. We do not use the simple average price because it is too easily influenced by a change in the mix (i.e. proportion of different property types, locations etc) of houses.

House price information is derived from Nationwide's lending for owner occupier house purchases at the post survey approval stage.

Where to find the latest data

You can access our house price data and reports on the Nationwide House Price Index website

Different factors are taken into account

To make sure we get an accurate representation of house prices across the UK, we account for:

  • Different seasons: House prices are slightly seasonal - that is, prices are higher at certain times of year irrespective of the overall trend. This tends to be in spring and summer, when more buyers are in the market and hence sellers do not need to discount prices so heavily, in order to achieve a sale.
  • Changes to the typical house: The weights used to calculate our typical house are updated from time to time to ensure the index maintains a relevant typical house. We currently update our weights every two years using four years’ worth of data.

What the HPI does

We aim to give you an overall picture of the UK housing market every month. And in our quarterly reports, we break it down further and show you house price developments in each region.

However, it doesn't mean that your house has followed this pattern. Your own house depends on lots of other variables - even new builds will be valued slighly differently after they've been lived in once.

The Nationwide House Price Calculator is intended to illustrate general movement in prices only.

The calculator is based on the Nationwide House Price Index. Results are based on movements in prices in the regions of the UK rather than in specific towns and cities. The data is based on movements in the price of a typical property in the region, and cannot take account of differences in quality of fittings, decoration etc.

How to use our HPI calculator

You can access our HPI calculator on our house price website, just follow the instructions on the site to get a rough guide to the current value of your home.

For an accurate valuation of your property we would always recommend you consult a local estate agent or surveyor.

Legal Information

The Nationwide House Price Indices are prepared from information that we believe is collated with care, but no representation is made as to their accuracy or completeness. We reserve the right to vary our methodology and to edit or discontinue the indices at any time, for regulatory or other reasons.

Persons seeking to place reliance on the Indices for any purpose whatsoever do so at their own risk and should be aware that various factors, including external factors beyond Nationwide Building Society’s control might necessitate material changes to the Indices.

The Nationwide House Price Indices may not be used for commercial purposes including as a reference for: 1) determining the interest payable, or other sums due, under loan agreements or other contracts relating to investments 2) determining the price at which investments may be bought or sold or the value of investments or 3) measuring the performance of investments.

Nationwide Building Society is the owner of the trade mark “Nationwide” and all copyright and other rights in the Nationwide House Price Indices.

The application of the IOSCO Principles on financial benchmarks to the NHPI is more fully set out in our statement regarding IOSCO Principles. Nationwide considers that its arrangements for administration of the NHPI comply with the IOSCO Principles in a proportionate manner having regard to the nature of the index.