Cheapest builders to convert your basement in SE18
Range from the cheapest Basement conversion £26250 (Birdz Property Services based in DA16) to the dearest Basement conversion £43800 (S M G Building Contractors based in SE18).
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 SE18 by posting a job with HaMuch and we will send it to extension builders in SE18.
Estimates for common extension builder jobs in SE18;
| Job | Estimate |
| Underpinning a house | £17365 |
| Build a two storey extension | £87797 |
| Build a timber frame extension | £25865 |
| Install a swimming pool | £80865 |
| Cost to build a single storey extension | £47299 |
| Cost to build a side return extension | £35981 |
| Install an RSJ | £2065 |
| Build an outbuilding | £9865 |
| Build a mansard loft conversion | £51865 |
| Cost of a loft conversion | £32484 |
| Build a kitchen extension | £41865 |
| Build a hip to gable loft conversion | £41865 |
| Build a granny annexe | £86865 |
| Build a garden office | £9865 |
| Convert a garage | £15865 |
| Build a flat roof extension | £21865 |
| Build a dormer loft conversion | £41865 |
| Lay a concrete foundation | £6115 |
| Convert a bungalow loft | £28865 |
| Basement conversion cost | £35981 |