Range from the cheapest single storey extension £51,960 (Advance Construction Solutions based in EN6) to the dearest single storey extension £54,360 (Premium Design Construction LTD based in EN6).
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 EN6 by posting a job with HaMuch and we will send it to extension builders in EN6.
