Property investment: top 20 places to make money in London Estate agent Savills has released a five-year forecast of property price rises in London. Here are, in descending order, are the 20 boroughs expected to see the most growth. Hounslow At number 20 is the south-western borough of Hounslow, where you'll find popular commuter suburbs such as Chiswick and Brentford. Prices here are set to rise by 19.4 per cent in the next five years. Picture: Andrew Butterton / Alamy