There's no doubt that extensions cost a lot of money, but a lot of the time they're well worth the investment. It's always a sensible idea to get two or three quotes before you commit, but here's a general idea of costs to get you started.
|House extensions size and costs||Floor size (metres)||Flat roof||Pitched roof|
|Single storey with one window||3x3|
|Double storey with two windows||3x3|
When you sign up, you'll get access to this expert guide as well as thousands of exclusive reviews.
We test products in the way you use them, looking at quality and ease of use without being bamboozled by manufacturers' claims.