Cheapest builders to convert your basement in Botany Bay
Range from the cheapest Basement conversion £35610 (Firtree Building Services Ltd based in EN1) to the dearest Basement conversion £46500 (Acme Lofts & Extensions based in EN2).
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 Botany Bay by posting a job with HaMuch and we will send it to extension builders in Botany Bay.
Estimates for common extension builder jobs in Botany Bay;
| Job | Estimate |
| Underpinning a house | £17438 |
| Build a two storey extension | £87907 |
| Build a timber frame extension | £25938 |
| Install a swimming pool | £80938 |
| Cost to build a single storey extension | £48765 |
| Cost to build a side return extension | £36805 |
| Install an RSJ | £2138 |
| Build an outbuilding | £9938 |
| Build a mansard loft conversion | £51938 |
| Cost of a loft conversion | £33171 |
| Build a kitchen extension | £41938 |
| Build a hip to gable loft conversion | £41938 |
| Build a granny annexe | £86938 |
| Build a garden office | £9938 |
| Convert a garage | £15938 |
| Build a new garage | £18438 |
| Build a flat roof extension | £21938 |
| Build a dormer loft conversion | £41938 |
| Lay a concrete foundation | £6188 |
| Convert a bungalow loft | £28938 |
| Basement conversion cost | £36805 |