Petty France house price trends

The scatter plot below reveals the house price trend for Petty France. The graph is constructed by plotting the price per square meter by date for all sales shows sales for only SW1H 9H . 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 67 homes on Petty France, we would have expected about 9 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 11 property sales in Petty France with 0 sold as new, averaging about 2 home sales per year . The average price per square metre (per square foot) in Petty France, St. James's Park is £12,094 sqm (£1,123 per sq ft), this is from the price paid of the 11 most recent sales.
The average size of all the properties on Petty France is 35 m2 (376 sqft).