Cheapest builders to convert your basement in SL9
Range from the cheapest Basement conversion £35700 (Swan Windows & Son Limited based in WD3) to the dearest Basement conversion £42000 (KATELL PROPERTY MAINTENANCE based in WD3).
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 SL9 by posting a job with HaMuch and we will send it to extension builders in SL9.
Estimates for common extension builder jobs in SL9;
| Job | Estimate |
| Underpinning a house | £17467 |
| Build a two storey extension | £87951 |
| Build a timber frame extension | £25967 |
| Install a swimming pool | £80967 |
| Cost to build a single storey extension | £49341 |
| Cost to build a side return extension | £37129 |
| Install an RSJ | £2167 |
| Build an outbuilding | £9967 |
| Build a mansard loft conversion | £51967 |
| Cost of a loft conversion | £33441 |
| Build a kitchen extension | £41967 |
| Build a hip to gable loft conversion | £41967 |
| Build a granny annexe | £86967 |
| Build a garden office | £9967 |
| Convert a garage | £15967 |
| Build a new garage | £18467 |
| Build a flat roof extension | £21967 |
| Build a dormer loft conversion | £41967 |
| Lay a concrete foundation | £6217 |
| Convert a bungalow loft | £28967 |
| Basement conversion cost | £37129 |