The Americas boast five of the world's top 10 cities for luxury real estate - Los Angeles, Miami, New York, San Francisco and Toronto.
These global economic hubs attract wealthy domestic and international buyers. Turnover of high-end properties is rapid, thanks to strong demand and limited supply. Resort markets for luxury second homes are also providing popular with international buyers, notably Caribbean island such as St Barts and the Caymans.
The starting price for a luxury home in New York and Los Angeles, compared with $2.2m worldwide.
The price of the penthouse One57 in New York, the most expensive home sold in North America in 2015.