Between January 2011 and December 2015, 512 houses and townhouses were bought and sold in Fitzroy. If we compare the average prices in 2011 and 2015, these have increased by about 9.4% per year. That’s the only thing this tells us: people spent more money on each house in 2015 than they did in 2011.
As a statistic, averages can be very misleading. They ignore any changes to the mix of properties being put on the market. For example, each time a property is refurbished, extended or renovated, the value of the property increases. While this increase in value is reflected in an increased average price, this is not true capital growth, as additional investments had to be made. Also, with only about 100 properties being sold each year, the sale of a very few, very large houses would have a significant impact on the average price in that period.
If we break this down into individual years, we can see that average prices fluctuate, which again shows us the limitation of using averages as indicators of capital growth.