Range from the cheapest single storey extension £51,640 (Steve Knight Construction based in HP15) to the dearest single storey extension £71,000 (Bantry Construction Limited based in HP10).
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 Winchmore Hill by posting a job with HaMuch and we will send it to extension builders in Winchmore Hill.

"Single storey extension"
CHESHAM
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Single Storey Extension near Chesham | £36 | £237 |
| Single Storey Extension near Hazlemere | £34 | £235 |
| Single Storey Extension near Gerrards Cross | £37 | £244 |
| Single Storey Extension near Rickmansworth | £36 | £241 |
| Single Storey Extension near Berkhamsted | £35 | £227 |
| Single Storey Extension near Dacorum | £36 | £231 |
| Single Storey Extension near High Wycombe | £34 | £237 |
| Single Storey Extension near Hemel Hempstead | £36 | £231 |
| Single Storey Extension near Wycombe | £34 | £234 |
| Single Storey Extension near Watford | £37 | £239 |