Extension builder estimates (based on hourly rates) to build a single storey extension in Clerkenwell
Range from the cheapest single storey extension £46960 (Aylaa Exclusive based in EC1A) to the dearest single storey extension £74000 (Q Lofts and Extensions based in EC1R).
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 Clerkenwell by posting a job with HaMuch and we will send it to extension builders in Clerkenwell.
Estimates for common extension builder jobs in Clerkenwell;
| Job | Estimate |
| Underpinning a house | £17433 |
| Build a two storey extension | £87900 |
| Build a timber frame extension | £25933 |
| Install a swimming pool | £80933 |
| Cost to build a single storey extension | £48669 |
| Cost to build a side return extension | £36751 |
| Install an RSJ | £2133 |
| Build an outbuilding | £9933 |
| Build a mansard loft conversion | £51933 |
| Cost of a loft conversion | £33126 |
| Build a kitchen extension | £41933 |
| Build a hip to gable loft conversion | £41933 |
| Build a granny annexe | £86933 |
| Build a garden office | £9933 |
| Convert a garage | £15933 |
| Build a new garage | £18433 |
| Build a flat roof extension | £21933 |
| Build a dormer loft conversion | £41933 |
| Lay a concrete foundation | £6183 |
| Convert a bungalow loft | £28933 |
| Basement conversion cost | £36751 |