Extension builder estimates (based on hourly rates) to build a single storey extension in HP20
Range from the cheapest single storey extension £45520 (Clear Choice Construction Ltd based in HP20) to the dearest single storey extension £50320 (Just Lofts based in HP20).
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 HP20 by posting a job with HaMuch and we will send it to extension builders in HP20.
Estimates for common extension builder jobs in HP20;
| Job | Estimate |
| Underpinning a house | £17395 |
| Build a two storey extension | £87842 |
| Build a timber frame extension | £25895 |
| Install a swimming pool | £80895 |
| Cost to build a single storey extension | £47894 |
| Cost to build a side return extension | £36316 |
| Install an RSJ | £2095 |
| Build an outbuilding | £9895 |
| Build a mansard loft conversion | £51895 |
| Cost of a loft conversion | £32763 |
| Build a kitchen extension | £41895 |
| Build a hip to gable loft conversion | £41895 |
| Build a granny annexe | £86895 |
| Build a garden office | £9895 |
| Convert a garage | £15895 |
| Build a new garage | £18395 |
| Build a flat roof extension | £21895 |
| Build a dormer loft conversion | £41895 |
| Lay a concrete foundation | £6145 |
| Convert a bungalow loft | £28895 |
| Basement conversion cost | £36316 |