Cheapest builders to convert your basement in Coulsdon
Range from the cheapest Basement conversion £35700 (Duo Builders based in CR5) to the dearest Basement conversion £36870 (Duo Builders based in CR5).
Comparing extension builders estimates for a Basement conversion 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 for the cost to convert a basement in Coulsdon by posting a job with HaMuch and we will send it to extension builders in Coulsdon.
Estimates for common extension builder jobs in Coulsdon;
| Job | Estimate |
| Underpinning a house | £17392 |
| Build a two storey extension | £87837 |
| Build a timber frame extension | £25892 |
| Install a swimming pool | £80892 |
| Cost to build a single storey extension | £47830 |
| Cost to build a side return extension | £36280 |
| Install an RSJ | £2092 |
| Build an outbuilding | £9892 |
| Build a mansard loft conversion | £51892 |
| Cost of a loft conversion | £32733 |
| Build a kitchen extension | £41892 |
| Build a hip to gable loft conversion | £41892 |
| Build a granny annexe | £86892 |
| Build a garden office | £9892 |
| Convert a garage | £15892 |
| Build a new garage | £18392 |
| Build a flat roof extension | £21892 |
| Build a dormer loft conversion | £41892 |
| Lay a concrete foundation | £6142 |
| Convert a bungalow loft | £28892 |
| Basement conversion cost | £36280 |