Range from the cheapest single storey extension £51,800 (Peter Cox Ltd - Uxbridge based in UB8) to the dearest single storey extension £54,040 (P & S Contractors based in SL9).
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 Denham by posting a job with HaMuch and we will send it to extension builders in Denham.

| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Single Storey Extension near Hillingdon | £56 | £240 |
| Single Storey Extension near Gerrards Cross | £37 | £244 |
| Single Storey Extension near Rickmansworth | £36 | £241 |
| Single Storey Extension near Watford | £37 | £239 |
| Single Storey Extension near Harrow | £37 | £235 |
| Single Storey Extension near Slough | £36 | £238 |
| Single Storey Extension near Bushey | £37 | £240 |
| Single Storey Extension near Windsor & Maidenhead | £36 | £238 |
| Single Storey Extension near Windsor | £36 | £238 |
| Single Storey Extension near Ealing | £38 | £237 |