Cheapest builders to convert your basement in South West London
Range from the cheapest Basement conversion £33000 (Prosper Building Ltd based in TW4) to the dearest Basement conversion £150000 (RS Rightsolution Ltd based in TW4).
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 South West London by posting a job with HaMuch and we will send it to extension builders in South West London.
Estimates for common extension builder jobs in South West London;
| Job | Estimate |
| Underpinning a house | £17928 |
| Build a two storey extension | £88642 |
| Build a timber frame extension | £26428 |
| Install a swimming pool | £81428 |
| Cost to build a single storey extension | £58557 |
| Cost to build a side return extension | £42313 |
| Install an RSJ | £2628 |
| Build an outbuilding | £10428 |
| Build a mansard loft conversion | £52428 |
| Cost of a loft conversion | £37761 |
| Build a kitchen extension | £42428 |
| Build a hip to gable loft conversion | £42428 |
| Build a granny annexe | £87428 |
| Build a garden office | £10428 |
| Convert a garage | £16428 |
| Build a new garage | £18928 |
| Build a flat roof extension | £22428 |
| Build a dormer loft conversion | £42428 |
| Lay a concrete foundation | £6678 |
| Convert a bungalow loft | £29428 |
| Basement conversion cost | £42313 |