Extension builder estimates (based on hourly rates) to build a single storey extension in CM11
Range from the cheapest single storey extension £34000 (Royal Roofing & building contractors based in SS12) to the dearest single storey extension £50000 (Clive Williams based in CM13).
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 CM11 by posting a job with HaMuch and we will send it to extension builders in CM11.
Estimates for common extension builder jobs in CM11;
| Job | Estimate |
| Underpinning a house | £17276 |
| Build a two storey extension | £87664 |
| Build a timber frame extension | £25776 |
| Install a swimming pool | £80776 |
| Cost to build a single storey extension | £45520 |
| Cost to build a side return extension | £34980 |
| Install an RSJ | £1976 |
| Build an outbuilding | £9776 |
| Build a mansard loft conversion | £51776 |
| Cost of a loft conversion | £31650 |
| Build a kitchen extension | £41776 |
| Build a hip to gable loft conversion | £41776 |
| Build a granny annexe | £86776 |
| Build a garden office | £9776 |
| Convert a garage | £15776 |
| Build a new garage | £18276 |
| Build a flat roof extension | £21776 |
| Build a dormer loft conversion | £41776 |
| Lay a concrete foundation | £6026 |
| Convert a bungalow loft | £28776 |
| Basement conversion cost | £34980 |