Mansard loft conversion cost in W1J
Mansard loft conversions are ideal if you want to maximise the space in your home. Extending your roof out into a flat roof with an almost vertical wall, they almost always require planning permission but can add significant value to your home.
Mansard loft conversions range from the cheapest installation of £50160 (London Design And Build based in SW1A) to the dearest of around £51944 (Mayfair Design based in W1J).
While these estimates give you a good idea how much you'll pay for a mansard loft conversion, the only way to get an accurate price is to get real quotes from real builders.
Get quotes to install a mansard loft conversion in W1J by posting a job with HaMuch and we'll send it to extension builders in W1J.
Estimates for common extension builder jobs in W1J;
| Job | Estimate |
| Underpinning a house | £17329 |
| Build a two storey extension | £87744 |
| Build a timber frame extension | £25829 |
| Install a swimming pool | £80829 |
| Cost to build a single storey extension | £46589 |
| Cost to build a side return extension | £35581 |
| Install an RSJ | £2029 |
| Build an outbuilding | £9829 |
| Build a mansard loft conversion | £51829 |
| Cost of a loft conversion | £32151 |
| Build a kitchen extension | £41829 |
| Build a hip to gable loft conversion | £41829 |
| Build a granny annexe | £86829 |
| Build a garden office | £9829 |
| Convert a garage | £15829 |
| Build a new garage | £18329 |
| Build a flat roof extension | £21829 |
| Build a dormer loft conversion | £41829 |
| Lay a concrete foundation | £6079 |
| Convert a bungalow loft | £28829 |
| Basement conversion cost | £35581 |