Range from the cheapest single storey extension £39,000 (L.M Landscapes & Driveways based in Tw15) to the dearest single storey extension £63,000 (Maben Construction Ltd based in TW13).
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 Spelthorne by posting a job with HaMuch and we will send it to extension builders in Spelthorne.

"Single storey extension"
SHEPPERTON
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Single Storey Extension near Sunbury-on-Thames | £37 | £242 |
| Single Storey Extension near Staines-upon-Thames | £36 | £231 |
| Single Storey Extension near Egham | £36 | £228 |
| Single Storey Extension near Walton-on-Thames | £37 | £238 |
| Single Storey Extension near West Molesey | £37 | £243 |
| Single Storey Extension near New Haw | £37 | £236 |
| Single Storey Extension near Elmbridge | £37 | £240 |
| Single Storey Extension near Hounslow | £37 | £243 |
| Single Storey Extension near Richmond Upon Thames | £37 | £236 |
| Single Storey Extension near Esher | £37 | £237 |