How much will my loft conversion cost?
Factors determining the price of a loft conversion in Brighton include the type of loft conversion, the inclusion of framing carpentry, staircase installation, the level and quality of finish, complexity of build and custom design (if any).
The cheapest loft conversion (room in the loft) starts from £15,000. A dormer loft conversion ranges from £20,000 to £45,000. Any loft conversion that requires raising or changing the roof structure such as a mansard or double mansard loft conversion starts from £40,000 upwards.
You could request a custom package where the room is created offsite and installed in your loft. It is faster than rebuilding the roof or replacing rafters. It costs £55,000 upwards.