This map shows for the first time the average price per m² of houses in each postcode district in England & Wales. It uses new government data on floor area from EPC certificates, matched with 6.2 million residential house sales since 2007.

Who made this? I'm Anna Powell-Smith, a technologist and policy analyst. Get in touch if you'd like to talk.

Methodology: Sale prices taken from Land Registry's Price Paid dataset of residential property sales to individuals since August 2007. Floor area in m² per property taken from Energy Performance Certificates. I join each property sale to the property's most recent EPC, using normalised addresses: this finds a match 79% of the time, for around 6.2 million property sales. The aggregate price per m² for each postcode district is then calculated as the total price of all sales, divided by the total floor area of all properties. The occasional black hole is a postcode district with no matching residential transactions, e.g. Heathrow and parts of the City of London. Last updated January 2018.

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Attribution: Postcode district derived boundaries reproduced under the Open Government Licence v3.0. Postal Boundaries © GeoLytix copyright and database right 2012. Contains Ordnance Survey data © Crown copyright and database right 2012. Contains Royal Mail data © Royal Mail copyright and database right 2012. Contains National Statistics data © Crown copyright and database right 2012. Price Paid data produced by HM Land Registry © Crown copyright 2017.