Range from the cheapest single storey extension £51,640 (Griana Builds based in W14) to the dearest single storey extension £53,880 (Rose Narmani based in W8).
Comparing extension builders estimates for fitting a downstairs toilet gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes to build a single storey extension in Kensington And Chelsea by posting a job with HaMuch and we will send it to extension builders in Kensington And Chelsea.
