Homes in the most expensive area of England and Wales cost 25 times as much as in the cheapest area, according to Office for National Statistics (ONS) analysis of 2016 property prices.
One square metre of floor space – an area about the size of a red phone box – costs almost £19,439 in Kensington and Chelsea, while in Blaenau Gwent in the South Wales valleys, the same amount of space costs £777.
ONS also found that new flats in England and Wales have got 18% bigger in the last three years, while new houses have remained around the same size.
Explore the cheapest and most expensive areas in England and Wales to buy property
Price per square metre
In 2016 the average cost of property sold in England and Wales was £2,395 per square metre.
Unsurprisingly, 19 of the top 20 most expensive local authority areas are in London, with Kensington and Chelsea, the City of London, Westminster and Camden topping the list.
Barking and Dagenham was the least expensive London borough, where homes cost £3,994 per square metre.
Elmbridge in Surrey is the costliest area outside London, while York was the most expensive area in the North of England.
South Wales and Lancashire are the cheapest places to buy property. In Blaenau Gwent, Merthyr Tydfil, Neath Port Talbot, Burnley and Hyndburn, homes cost less than £1,000 per square metre.
We’ve also used this data to help you find out Will an extension increase the value of my house?
How big are our homes?
The average house sold in England and Wales in 2016 had a floor area of 104 metres squared – that’s about two-fifths the size of a tennis court, or 70 times smaller than the football pitch at Wembley.
Flats averaged 49 metres squared (excluding bathrooms, corridors, hallways and landings) – that’s just over four times bigger than a typical car-parking space.
Taking flats and houses together, the average size of properties sold in England and Wales in 2016 was 90 metres squared – a little smaller than the EU average, and much smaller than new homes in the United States.
Average size of homes in selected EU countries and USA1
Are houses getting bigger?
New properties are a lot bigger than existing ones: in 2016, the average new house sold was 13% bigger than the average existing house, while the average new flat was 17% bigger than the average existing flat.
In the last three years, new flats in England and Wales have increased in size by 8.5 metres squared. This could be because there is a higher proportion of maisonettes (flats with more than one storey, which tend to be larger too) in the housing market.
We’ve used ONS data on property prices per square metre to help you find out what extra floor space could be worth in your area.
The value of an extension will depend on many things that we haven’t allowed for here, like the quality of construction, what type of room it is, and the exact location of the property within your local authority. This calculator uses average values for houses across local authority areas.
To embed the map in your site use the following code:
<iframe width="100%" height="1200px" src="https://www.ons.gov.uk/visualisations/dvc434/map/index.html" scrolling="no" frameborder="0"/>
To embed the floorplan in your site use the following code:
<iframe width="100%" height="1200px" src="https://www.ons.gov.uk/visualisations/dvc434/floorplan/index.html" scrolling="no" frameborder="0"/>
To embed the extension value calculator in your site use the following code:
<iframe width="100%" height="1200px" src="https://www.ons.gov.uk/visualisations/dvc434/calculator/index.html" scrolling="no" frameborder="0"/>
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