Cheapest builders to convert your basement in W1M
Range from the cheapest Basement conversion £35700 (Pillar Contractors Ltd based in W1K) to the dearest Basement conversion £36870 (Azur London based in W1U).
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 W1M by posting a job with HaMuch and we will send it to extension builders in W1M.
Estimates for common extension builder jobs in W1M;
| Job | Estimate |
| Underpinning a house | £17409 |
| Build a two storey extension | £87864 |
| Build a timber frame extension | £25909 |
| Install a swimming pool | £80909 |
| Cost to build a single storey extension | £48182 |
| Cost to build a side return extension | £36478 |
| Install an RSJ | £2109 |
| Build an outbuilding | £9909 |
| Build a mansard loft conversion | £51909 |
| Cost of a loft conversion | £32898 |
| Build a kitchen extension | £41909 |
| Build a hip to gable loft conversion | £41909 |
| Build a granny annexe | £86909 |
| Build a garden office | £9909 |
| Convert a garage | £15909 |
| Build a new garage | £18409 |
| Build a flat roof extension | £21909 |
| Build a dormer loft conversion | £41909 |
| Lay a concrete foundation | £6159 |
| Convert a bungalow loft | £28909 |
| Basement conversion cost | £36478 |