Cheapest builders to convert your basement in SE12
Range from the cheapest Basement conversion £29400 (Our Builders Ltd based in SE6) to the dearest Basement conversion £37500 (H2 Construction Ltd based in SE9).
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 SE12 by posting a job with HaMuch and we will send it to extension builders in SE12.
Estimates for common extension builder jobs in SE12;
| Job | Estimate |
| Underpinning a house | £17357 |
| Build a two storey extension | £87786 |
| Build a timber frame extension | £25857 |
| Install a swimming pool | £80857 |
| Cost to build a single storey extension | £47146 |
| Cost to build a side return extension | £35894 |
| Install an RSJ | £2057 |
| Build an outbuilding | £9857 |
| Build a mansard loft conversion | £51857 |
| Cost of a loft conversion | £32412 |
| Build a kitchen extension | £41857 |
| Build a hip to gable loft conversion | £41857 |
| Build a granny annexe | £86857 |
| Build a garden office | £9857 |
| Convert a garage | £15857 |
| Build a new garage | £18357 |
| Build a flat roof extension | £21857 |
| Build a dormer loft conversion | £41857 |
| Lay a concrete foundation | £6107 |
| Convert a bungalow loft | £28857 |
| Basement conversion cost | £35894 |