Surprisingly, one of the simplest home improvements you can make is also the best for adding value. According to Pryor’s findings, more than a third of home seekers desire a new boiler. These days, boilers are sleek and highly energy efficient, like this Greenstar i Combi boiler from Worcester Bosch. With the average cost of a new boiler set at around £1,750, this simple installation will add almost £10,000 to the value of your home, leaving you with £8,000 to play with.