Cheapest builders to convert your basement in R1
Range from the cheapest Basement conversion £31200 (London Quality Construction Group Limited based in BR2) to the dearest Basement conversion £42000 (Silverland design & build based in BR1).
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 R1 by posting a job with HaMuch and we will send it to extension builders in R1.
Estimates for common extension builder jobs in R1;
| Job | Estimate |
| Underpinning a house | £17370 |
| Build a two storey extension | £87805 |
| Build a timber frame extension | £25870 |
| Install a swimming pool | £80870 |
| Cost to build a single storey extension | £47395 |
| Cost to build a side return extension | £36035 |
| Install an RSJ | £2070 |
| Build an outbuilding | £9870 |
| Build a mansard loft conversion | £51870 |
| Cost of a loft conversion | £32529 |
| Build a kitchen extension | £41870 |
| Build a hip to gable loft conversion | £41870 |
| Build a granny annexe | £86870 |
| Build a garden office | £9870 |
| Convert a garage | £15870 |
| Build a new garage | £18370 |
| Build a flat roof extension | £21870 |
| Build a dormer loft conversion | £41870 |
| Lay a concrete foundation | £6120 |
| Convert a bungalow loft | £28870 |
| Basement conversion cost | £36035 |