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Wednesday 28 March 2018

Lies, damned lies and Oxford property price statistics!


Last week the Office for National Statistics (ONS) published a report on house prices.  In the report, Oxford was singled-out as a market that had experienced a 4.7% fall in house prices.  Even London had done better, much better!

I place reliance on Land Registry data – information that is based on the houses and apartments that have sold.  That data is reporting that Oxford house prices have increased year on year by 3% based on data for the year to February 2018.  A massive 7.7% spread between two valued and supposedly trustworthy sources.

So why the 7.7% spread in house price changes?

The ONS report is based on data just for the month of January i.e. January 2018 vs January 2017.  In-month Oxford sale prices ca
Last week the Office for National Statistics (ONS) published a report on house prices.  In the report, Oxford was singled-out as a market that had experienced a 4.7% fall in house prices.  Even London had done better, much better!
I place reliance on Land Registry data – information that is based on the houses and apartments that have sold.  That data is reporting that Oxford house prices have increased year on year by 3% based on data for the year to February 2018.  A massive 7.7% spread between two valued and supposedly trustworthy sources.
So why the 7.7% spread in house price changes?
The ONS report is based on data just for the month of January i.e. January 2018 vs January 2017.  In-month Oxford sale prices can be rather erratic, and also subject to later revision, once the data is confirmed for all completed sales.  To illustrate this point, the ONS reports that Oxford properties increased in value by 0.7% in December 2017 but fell by 4.7% in January 2018 – quite a difference, I think you will agree.  In December the ONS also reported that prices in London’s Kensington and Chelsea had fallen by 10.7% only to revise that to minus 6.9% in their January report.
So why is the ONS data so volatile?  It is largely because of the way the data is collated.  Registrations of properties following a sale take some time, often reaching the Land Registry months after the sale is completed.  As a result, the data improves in accuracy over time requiring the ONS to recalculate their index figures each month for previous months.
At the time of writing the Land Registry has just 41 sales registered in Oxford for January 2018 compared to 117 in January 2017.  That is a small sample, and one that can be significantly affected by the actual properties included - for example, the January 2017 data contains a few higher value properties with a sale price over £1.2m.  If the January 2018 data contains more 2 or 3 bed roomed properties nearer the Oxford average, it is bound to result in a poor comparison with January 2017.
It is much better to use data that is based on rolling a 12-month period so each month’s data is based on movement over the last 12 months, ensuring a much larger sample and avoiding erratic in month changes.
But, what can the ONS data tell us?  In isolation not very much But, together with longer-term trend data there is a definite slowing in the rate of annual growth in Oxford’s property prices.  Over the last 4 or 5 months, the long-term trend of growth has progressively reduced from c6% down to the February 3%.  This together with a continued reduction in total transactions points to a market where property is expensive, and where home owners either can’t afford to move, or are choosing to stay put and improve the property they have.  It also points to a market where buyers are taking their time to commit, reflecting a shortage in choice and caution given the gearing required to proceed.
For home owners in a hurry to move, sensible pricing and targeted marketing are critical.

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