Cheapest builders to convert your basement in Mortlake
Range from the cheapest Basement conversion £35700 (Sunny Eco based in SW14) to the dearest Basement conversion £36870 (Metos Design & Build based in SW14).
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 Mortlake by posting a job with HaMuch and we will send it to extension builders in Mortlake.
Estimates for common extension builder jobs in Mortlake;
| Job | Estimate |
| Underpinning a house | £17373 |
| Build a two storey extension | £87810 |
| Build a timber frame extension | £25873 |
| Install a swimming pool | £80873 |
| Cost to build a single storey extension | £47466 |
| Cost to build a side return extension | £36074 |
| Install an RSJ | £2073 |
| Build an outbuilding | £9873 |
| Build a mansard loft conversion | £51873 |
| Cost of a loft conversion | £32562 |
| Build a kitchen extension | £41873 |
| Build a hip to gable loft conversion | £41873 |
| Build a granny annexe | £86873 |
| Build a garden office | £9873 |
| Convert a garage | £15873 |
| Build a new garage | £18373 |
| Build a flat roof extension | £21873 |
| Build a dormer loft conversion | £41873 |
| Lay a concrete foundation | £6123 |
| Convert a bungalow loft | £28873 |
| Basement conversion cost | £36074 |