Duke Street house price trends

The scatter plot below reveals the house price trend for Duke Street. The graph is constructed by plotting the price per square meter by date for all sales shows sales for only SW1Y 6B . 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 approximately 20 homes on Duke Street, we would have expected about 2 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 5 property sales in Duke Street with 0 sold as new, averaging about 1 home sales per year . The average price per square metre (per square foot) in Duke Street, Piccadilly Circus is £14,901 sqm (£1,384 per sq ft), this is from the sold price of the 5 most recent sales.
The average size of all the properties on Duke Street is 45 m2 (484 sqft).