To answer this question, we’ve created a revolutionary costing tool. You simply have to use the three drop downs below to calculate what extensions are available to you, and at what cost. Have a play, and please let us know how you get on!

*Please note: All estimated costs include building work, plumbing, electricity, glazing and external doors – and applicable VAT.

1. House Type
2. Extension/Conversion Type
3. Roof Type

Estimated Cost