Extension builder estimates (based on hourly rates) to build a single storey extension in South Kensington
Range from the cheapest single storey extension £46800 (Ventura Property Developments based in SW7) to the dearest single storey extension £58000 (Klai Construction based in Sw7).
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 South Kensington by posting a job with HaMuch and we will send it to extension builders in South Kensington.
Estimates for common extension builder jobs in South Kensington;
| Job | Estimate |
| Underpinning a house | £17409 |
| Build a two storey extension | £87863 |
| Build a timber frame extension | £25909 |
| Install a swimming pool | £80909 |
| Cost to build a single storey extension | £48176 |
| Cost to build a side return extension | £36474 |
| Install an RSJ | £2109 |
| Build an outbuilding | £9909 |
| Build a mansard loft conversion | £51909 |
| Cost of a loft conversion | £32895 |
| Build a kitchen extension | £41909 |
| Build a hip to gable loft conversion | £41909 |
| Build a granny annexe | £86909 |
| Build a garden office | £9909 |
| Convert a garage | £15909 |
| Build a new garage | £18409 |
| Build a flat roof extension | £21909 |
| Build a dormer loft conversion | £41909 |
| Lay a concrete foundation | £6159 |
| Convert a bungalow loft | £28909 |
| Basement conversion cost | £36474 |