average loft conversion cost
On average, a loft conversion costs anywhere between 20,000 and 30,000. Most full conversions will only bill for the floor, windows and roof. If you want furniture fittings, expect to pay more.ros and cons. Turning your dusty, unused attic into another room is a clearly a great way to add value to your property, but there are both advantages and disadvantages which you may want to consider first: Pros 1  : Added Property Value: A conversion will cost an average of 27,000 but may add 60,000 to your property.