Cheapest builders to convert your basement in FY1
Range from the cheapest Basement conversion £26250 (Chesney Construction based in FY4) to the dearest Basement conversion £36600 (K&S probuild ltd based in FY1).
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 FY1 by posting a job with HaMuch and we will send it to extension builders in FY1.
Estimates for common extension builder jobs in FY1;
| Job | Estimate |
| Underpinning a house | £17007 |
| Build a two storey extension | £87260 |
| Build a timber frame extension | £25507 |
| Install a swimming pool | £80507 |
| Cost to build a single storey extension | £40131 |
| Cost to build a side return extension | £31949 |
| Install an RSJ | £1707 |
| Build an outbuilding | £9507 |
| Build a mansard loft conversion | £51507 |
| Cost of a loft conversion | £29124 |
| Build a kitchen extension | £41507 |
| Build a hip to gable loft conversion | £41507 |
| Build a granny annexe | £86507 |
| Build a garden office | £9507 |
| Convert a garage | £15507 |
| Build a new garage | £18007 |
| Build a flat roof extension | £21507 |
| Build a dormer loft conversion | £41507 |
| Lay a concrete foundation | £5757 |
| Convert a bungalow loft | £28507 |
| Basement conversion cost | £31949 |