How expensive is it to change a flat roof to a pitched roof?

Converting a flat roof to a pitched roof is a bigger job than re-covering a flat roof, because you are building a new timber structure, covering it, and dealing with how it meets the rest of the house. The cost varies a great deal with the size of the roof and the complexity of the junction with the existing building.

The main things that drive the price are the size of the area, the pitch and design of the new roof, the covering you choose, any building regulations and structural work involved, and access for scaffolding. Converting the roof over a large extension is a very different job from a small garage.

It is worth weighing up against the alternative. A modern flat-roof system, laid properly with the right falls, can last a long time and costs considerably less than a pitched conversion. A pitched roof may still be the right choice for looks, drainage or matching the house, but it is not the only option.

Because every conversion is different, the only honest way to price one is to look at the specific roof. We are happy to come out, talk through whether a conversion or a new flat roof makes more sense for you, and quote accordingly.