How quickly do you choose a house? According to a recent survey, it takes on average 18 minutes at a single viewing to decide to buy a £150,000 home - less time than it takes to buy a £150 pair of shoes. The findings of the survey, by the online property finder fish4homes.com, are another example of the current hyped-up housing market, in which buyers are so desperate to find a property that they fling caution to the wind.