Cheapest builders to convert your basement in M19
Range from the cheapest Basement conversion £28500 (BEECHWOOD CONSTRUCTION based in SK2) to the dearest Basement conversion £40200 (SBN Building Services based in SK2).
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 M19 by posting a job with HaMuch and we will send it to extension builders in M19.
Estimates for common extension builder jobs in M19;
| Job | Estimate |
| Underpinning a house | £17138 |
| Build a two storey extension | £87458 |
| Build a timber frame extension | £25638 |
| Install a swimming pool | £80638 |
| Cost to build a single storey extension | £42768 |
| Cost to build a side return extension | £33432 |
| Install an RSJ | £1838 |
| Build an outbuilding | £9638 |
| Build a mansard loft conversion | £51638 |
| Cost of a loft conversion | £30360 |
| Build a kitchen extension | £41638 |
| Build a hip to gable loft conversion | £41638 |
| Build a granny annexe | £86638 |
| Build a garden office | £9638 |
| Convert a garage | £15638 |
| Build a new garage | £18138 |
| Build a flat roof extension | £21638 |
| Build a dormer loft conversion | £41638 |
| Lay a concrete foundation | £5888 |
| Convert a bungalow loft | £28638 |
| Basement conversion cost | £33432 |