Range from the cheapest single storey extension £39,000 (RTC Plumbers based in RM6) to the dearest single storey extension £55,000 (New look building based in RM6).
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 RM6 by posting a job with HaMuch and we will send it to extension builders in RM6.
