Cheapest builders to convert your basement in SL3
Range from the cheapest Basement conversion £28500 (Jeet & jarmal based in SL1) to the dearest Basement conversion £37140 (GDC Design & Build based in TW19).
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 SL3 by posting a job with HaMuch and we will send it to extension builders in SL3.
Estimates for common extension builder jobs in SL3;
| Job | Estimate |
| Underpinning a house | £17331 |
| Build a two storey extension | £87747 |
| Build a timber frame extension | £25831 |
| Install a swimming pool | £80831 |
| Cost to build a single storey extension | £46621 |
| Cost to build a side return extension | £35599 |
| Install an RSJ | £2031 |
| Build an outbuilding | £9831 |
| Build a mansard loft conversion | £51831 |
| Cost of a loft conversion | £32166 |
| Build a kitchen extension | £41831 |
| Build a hip to gable loft conversion | £41831 |
| Build a granny annexe | £86831 |
| Build a garden office | £9831 |
| Convert a garage | £15831 |
| Build a flat roof extension | £21831 |
| Build a dormer loft conversion | £41831 |
| Lay a concrete foundation | £6081 |
| Convert a bungalow loft | £28831 |
| Basement conversion cost | £35599 |