Think very carefully about what you need from a property, and may need five or 10 years from now. "For example," says Gray, "a large garden might appeal to you, but will you really have the time - or money - to maintain it? On the other hand, we find that people who are downsizing are also liable to under-estimate the amount of space they will need – such as an extra bedroom to use as a home office or to accommodate family visitors."