Where you choose to live can make a significant difference to the price you pay for a property. This is often due to the demand for properties in an area and the amenities, schools, work opportunities and leisure activities available. Other factors that can influence the price of homes are transportation links, environmental problems in an area, future development plans, and crime rates. Properties in cities are often more expensive per square meter than those in rural areas. However, there are some cities that are more expensive to live in than others. There are different ways of calculating how expensive a place is to live. While some people calculate this using a ratio of earnings compared to property price, this list is based on the price of property per square meter. Here are the top 20 most expensive places to buy a home in the world.