Cheapest builders to convert your basement in SW1X
Range from the cheapest Basement conversion £16800 (London Design And Build based in SW1A) to the dearest Basement conversion £36870 (Knightsbridge Design based in SW1X).
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 SW1X by posting a job with HaMuch and we will send it to extension builders in SW1X.
Estimates for common extension builder jobs in SW1X;
| Job | Estimate |
| Underpinning a house | £17277 |
| Build a two storey extension | £87665 |
| Build a timber frame extension | £25777 |
| Install a swimming pool | £80777 |
| Cost to build a single storey extension | £45539 |
| Cost to build a side return extension | £34991 |
| Install an RSJ | £1977 |
| Build an outbuilding | £9777 |
| Build a mansard loft conversion | £51777 |
| Cost of a loft conversion | £31659 |
| Build a kitchen extension | £41777 |
| Build a hip to gable loft conversion | £41777 |
| Build a granny annexe | £86777 |
| Build a garden office | £9777 |
| Convert a garage | £15777 |
| Build a new garage | £18277 |
| Build a flat roof extension | £21777 |
| Build a dormer loft conversion | £41777 |
| Lay a concrete foundation | £6027 |
| Convert a bungalow loft | £28777 |
| Basement conversion cost | £34991 |