Disclaimer

The calculators on BuildSums give estimates to help you plan a job and order materials. They are not professional advice, a structural design or a quote.

• Quantities depend on your site, the products you buy and how they’re laid. Check with your supplier before ordering, and allow for waste.
• Structural work, such as foundations, retaining walls, raised decks and roof structures, needs a qualified engineer and often building control approval.
• Gas work must be done by a Gas Safe registered engineer. Notifiable electrical work must be done or certified by a registered electrician.
• Running costs use average prices. Your tariff, region and usage will change the real figure.
• Planning and building regulations differ between England, Wales, Scotland and Northern Ireland. Check with your local council.

We work to keep figures accurate and up to date, but we can’t accept responsibility for losses from relying on them. If you find an error, please let us know.