Single Storey House Extension

Single storey rear extensions are the most popular home improvement project in the UK, with hundreds of thousands built every year. Whether you are adding a kitchen diner, a family room or a utility space, getting your material schedule right from the outset saves costly over-ordering, prevents mid-build shortfalls, and gives your builder or merchant a solid basis for quoting. This project kit covers everything from strip foundations and brickwork through to roof covering, insulation and internal plastering - the full material journey of a standard single storey extension.

Enter your extension dimensions and roof type once in the form on the right and the kit pre-fills the relevant calculators with your measurements. Work through each stage in order at your own pace - foundations first, structure, then roof and fit-out. Your project is saved automatically so you can refine figures as the design evolves.