Old Street house price trends

The scatter plot below reveals the house price trend for Old Street. The graph is constructed by plotting the price per square meter by date for all sales shows sales for only EC1V 9N . 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 45 homes on Old Street, we would have expected about 6 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 Old Street with 0 sold as new, averaging about 1 home sales per year . The average price per square metre (per square foot) in Old Street, Old Street is £8,867 sqm (£823 per sq ft), this is from sold property prices of the 5 most recent sales.
The average size of all the properties on Old Street is 73 m2 (785 sqft).