Extension builder estimates (based on hourly rates) to build a single storey extension in Kensington
Range from the cheapest single storey extension £29840 (Morley Building Services based in SW3) to the dearest single storey extension £48880 (Green Inside Limited T/A Dnomyar Interiors 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 Kensington by posting a job with HaMuch and we will send it to extension builders in Kensington.
Estimates for common extension builder jobs in Kensington;
| Job | Estimate |
| Underpinning a house | £17353 |
| Build a two storey extension | £87779 |
| Build a timber frame extension | £25853 |
| Install a swimming pool | £80853 |
| Cost to build a single storey extension | £47056 |
| Cost to build a side return extension | £35844 |
| Install an RSJ | £2053 |
| Build an outbuilding | £9853 |
| Build a mansard loft conversion | £51853 |
| Cost of a loft conversion | £32370 |
| Build a kitchen extension | £41853 |
| Build a hip to gable loft conversion | £41853 |
| Build a granny annexe | £86853 |
| Build a garden office | £9853 |
| Convert a garage | £15853 |
| Build a new garage | £18353 |
| Build a flat roof extension | £21853 |
| Build a dormer loft conversion | £41853 |
| Lay a concrete foundation | £6103 |
| Convert a bungalow loft | £28853 |
| Basement conversion cost | £35844 |