Manchester saw an increase in house prices of almost 9% over the last 12 months. And interest seems to be growing at almost the same speed. Post Office Money Mortgages named Manchester as one of the cities with the highest level of popularity in the UK. Examining the average time it takes to sell a property, the report had a closer look at 20 major cities across the UK and found that, on average, it takes 91 days to sell.