average cost of loft conversion
Figures from surveys consistantly show that a conversion which incorporates a bedroom and en-suite bathroom can add up to 20% to the value of your home. In London loft conversions usually cost up to Â£50,000 though throughout the UK the average seems to be around the Â£20,000 - Â£35,000 mark.owever, a really useful formula to work out the basic cost of a loft conversion is Sq meter x 1200 = cost. So, for example, if your roof space measures 4x4 meters than the a guide price for converting that loft would be Â£19,200 (4x4=16x1200=19,200).