Extension builder estimates (based on hourly rates) to build a single storey extension in W8
Range from the cheapest single storey extension £46640 (Griana Builds based in W14) to the dearest single storey extension £48880 (FrontierstroyUK based in W8).
Comparing extension builders estimates for fitting a downstairs toilet 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 to build a single storey extension in W8 by posting a job with HaMuch and we will send it to extension builders in W8.
Estimates for common extension builder jobs in W8;
| Job | Estimate |
| Underpinning a house | £17386 |
| Build a two storey extension | £87830 |
| Build a timber frame extension | £25886 |
| Install a swimming pool | £80886 |
| Cost to build a single storey extension | £47728 |
| Cost to build a side return extension | £36222 |
| Install an RSJ | £2086 |
| Build an outbuilding | £9886 |
| Build a mansard loft conversion | £51886 |
| Cost of a loft conversion | £32685 |
| Build a kitchen extension | £41886 |
| Build a hip to gable loft conversion | £41886 |
| Build a granny annexe | £86886 |
| Build a garden office | £9886 |
| Convert a garage | £15886 |
| Build a new garage | £18386 |
| Build a flat roof extension | £21886 |
| Build a dormer loft conversion | £41886 |
| Lay a concrete foundation | £6136 |
| Convert a bungalow loft | £28886 |
| Basement conversion cost | £36222 |