Cheapest builders to convert your basement in NN12
Range from the cheapest Basement conversion £32370 (Northampton Construction Services based in NN5) to the dearest Basement conversion £37500 (AJ DESIGN & BUILD LTD based in NN12).
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 NN12 by posting a job with HaMuch and we will send it to extension builders in NN12.
Estimates for common extension builder jobs in NN12;
| Job | Estimate |
| Underpinning a house | £17193 |
| Build a two storey extension | £87540 |
| Build a timber frame extension | £25693 |
| Install a swimming pool | £80693 |
| Cost to build a single storey extension | £43862 |
| Cost to build a side return extension | £34048 |
| Install an RSJ | £1893 |
| Build an outbuilding | £9693 |
| Build a mansard loft conversion | £51693 |
| Cost of a loft conversion | £30873 |
| Build a kitchen extension | £41693 |
| Build a hip to gable loft conversion | £41693 |
| Build a granny annexe | £86693 |
| Build a garden office | £9693 |
| Convert a garage | £15693 |
| Build a new garage | £18193 |
| Build a flat roof extension | £21693 |
| Build a dormer loft conversion | £41693 |
| Lay a concrete foundation | £5943 |
| Convert a bungalow loft | £28693 |
| Basement conversion cost | £34048 |