Cheapest builders to convert your basement in Mayfair
Range from the cheapest Basement conversion £35700 (Pillar Contractors Ltd based in W1K) to the dearest Basement conversion £42000 (A1&PM based in W1H).
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 Mayfair by posting a job with HaMuch and we will send it to extension builders in Mayfair.
Estimates for common extension builder jobs in Mayfair;
| Job | Estimate |
| Underpinning a house | £17428 |
| Build a two storey extension | £87892 |
| Build a timber frame extension | £25928 |
| Install a swimming pool | £80928 |
| Cost to build a single storey extension | £48566 |
| Cost to build a side return extension | £36694 |
| Install an RSJ | £2128 |
| Build an outbuilding | £9928 |
| Build a mansard loft conversion | £51928 |
| Cost of a loft conversion | £33078 |
| Build a kitchen extension | £41928 |
| Build a hip to gable loft conversion | £41928 |
| Build a granny annexe | £86928 |
| Build a garden office | £9928 |
| Convert a garage | £15928 |
| Build a new garage | £18428 |
| Build a flat roof extension | £21928 |
| Build a dormer loft conversion | £41928 |
| Lay a concrete foundation | £6178 |
| Convert a bungalow loft | £28928 |
| Basement conversion cost | £36694 |