Cheapest builders to convert your basement in SO21
Range from the cheapest Basement conversion £28500 (ANDYWORKS & son Ltd based in SO50) to the dearest Basement conversion £37500 (Gray's Facilities and Maintenance Services Ltd based in SO23).
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 SO21 by posting a job with HaMuch and we will send it to extension builders in SO21.
Estimates for common extension builder jobs in SO21;
| Job | Estimate |
| Underpinning a house | £17237 |
| Build a two storey extension | £87605 |
| Build a timber frame extension | £25737 |
| Install a swimming pool | £80737 |
| Cost to build a single storey extension | £44739 |
| Cost to build a side return extension | £34541 |
| Install an RSJ | £1937 |
| Build an outbuilding | £9737 |
| Build a mansard loft conversion | £51737 |
| Cost of a loft conversion | £31284 |
| Build a kitchen extension | £41737 |
| Build a hip to gable loft conversion | £41737 |
| Build a granny annexe | £86737 |
| Build a garden office | £9737 |
| Convert a garage | £15737 |
| Build a new garage | £18237 |
| Build a flat roof extension | £21737 |
| Build a dormer loft conversion | £41737 |
| Lay a concrete foundation | £5987 |
| Convert a bungalow loft | £28737 |
| Basement conversion cost | £34541 |