Great Portland Street house price trends

The scatter plot below reveals the house price trend for Great Portland Street. The graph is constructed by plotting the price per square meter by date for all sales shows sales for only W1W 7L . The blue circles represent individual sales. You can touch or click on each blue dot to see more detail about the specific sales.

View data in table form

There are roughly 28 homes on Great Portland Street, we would have expected about 4 sales each year given that in the UK people sell their homes on average once every 7 years.
In the last 4 years there have been 6 property sales in Great Portland Street with 0 sold as new, averaging approximately 1 home sales per year . The average price per square metre (per square foot) in Great Portland Street, Oxford Circus is £18,571 sqm (£1,725 per sq ft), this is from the Land Registry sold price of the 6 most recent sales.
The average size of all the properties on Great Portland Street is 88 m2 (947 sqft).