Loft conversion cost guide
Set a preliminary budget for your room-in-the-roof project with our benchmark pricing model
One of the core questions on any building project is how much you’ll need to pay to get the job done – and whether you’ll be able to recoup what you’ve spent.
The good news is that a well-conceived loft conversion can be one of the most effective routes to aing value to your home, with the potential to give a 20% return on your investment if you get it right.
The following figures provide a rough starting price for a small bedroom-only loft conversion (of around 20m2). However, these could easily double or triple depending on the size and complexity of your project:
■ Rooflight conversion from around £25,000 (£1,250 per m2)
■ Dormer conversion from around £33,000 (£1,650 per m2)
■ Mansard or hip-to-gable conversion from around £40,000 (£2,000 per m2)
The key factors that will affect the overall cost of your loft conversion include the size of the space, nature of the roof structure, type of conversion and the level of internal finish you require. If you’re planning to fit a bathroom, for example, this will involve more plumbing work and extra costs for sanitaryware and fixtures.