Cheapest builders to convert your basement in TW20
Range from the cheapest Basement conversion £28500 (L.M Landscapes & Driveways based in Tw15) to the dearest Basement conversion £37140 (GDC Design & Build based in TW19).
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 TW20 by posting a job with HaMuch and we will send it to extension builders in TW20.
Estimates for common extension builder jobs in TW20;
| Job | Estimate |
| Underpinning a house | £17340 |
| Build a two storey extension | £87760 |
| Build a timber frame extension | £25840 |
| Install a swimming pool | £80840 |
| Cost to build a single storey extension | £46800 |
| Cost to build a side return extension | £35700 |
| Install an RSJ | £2040 |
| Build an outbuilding | £9840 |
| Build a mansard loft conversion | £51840 |
| Cost of a loft conversion | £32250 |
| Build a kitchen extension | £41840 |
| Build a hip to gable loft conversion | £41840 |
| Build a granny annexe | £86840 |
| Build a garden office | £9840 |
| Convert a garage | £15840 |
| Build a flat roof extension | £21840 |
| Build a dormer loft conversion | £41840 |
| Lay a concrete foundation | £6090 |
| Convert a bungalow loft | £28840 |
| Basement conversion cost | £35700 |