Cheapest builders to convert your basement in B9
Range from the cheapest Basement conversion £26250 (J s building & maintenance services limited based in B26) to the dearest Basement conversion £33000 (Fletchers Building & Maintenance, Ltd. based in B11).
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 B9 by posting a job with HaMuch and we will send it to extension builders in B9.
Estimates for common extension builder jobs in B9;
| Job | Estimate |
| Underpinning a house | £17024 |
| Build a two storey extension | £87287 |
| Build a timber frame extension | £25524 |
| Install a swimming pool | £80524 |
| Cost to build a single storey extension | £40490 |
| Cost to build a side return extension | £32150 |
| Install an RSJ | £1724 |
| Build an outbuilding | £9524 |
| Build a mansard loft conversion | £51524 |
| Cost of a loft conversion | £29292 |
| Build a kitchen extension | £41524 |
| Build a hip to gable loft conversion | £41524 |
| Build a granny annexe | £86524 |
| Build a garden office | £9524 |
| Convert a garage | £15524 |
| Build a new garage | £18024 |
| Build a flat roof extension | £21524 |
| Build a dormer loft conversion | £41524 |
| Lay a concrete foundation | £5774 |
| Convert a bungalow loft | £28524 |
| Basement conversion cost | £32150 |