Our extension calculator
Our Extension Build Cost Calculator makes it easy to get a quick estimate for your project in just a few clicks. Simply enter a few details about your extension such as size, type, and finish level and our calculator will give you an instant indication of likely costs, helping you plan and budget your project before you make a start.
Whether you are considering a single-storey rear extension, a two-storey extension, a side extension, a wraparound extension or a more bespoke home improvement project, this tool is designed to give you a clearer starting point. The result is not a formal quotation or fixed construction price, but it can help you understand what may be realistic, compare different options and decide whether your plans align with your budget before any architectural design work even begins.
