Extension builder estimates (based on hourly rates) to build a single storey extension in B10
Range from the cheapest single storey extension £30000 (J s building & maintenance services limited based in B26) to the dearest single storey extension £50000 (Low costi builders ltd based in B34).
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 B10 by posting a job with HaMuch and we will send it to extension builders in B10.
Estimates for common extension builder jobs in B10;
| Job | Estimate |
| Underpinning a house | £17041 |
| Build a two storey extension | £87311 |
| Build a timber frame extension | £25541 |
| Install a swimming pool | £80541 |
| Cost to build a single storey extension | £40816 |
| Cost to build a side return extension | £32334 |
| Install an RSJ | £1741 |
| Build an outbuilding | £9541 |
| Build a mansard loft conversion | £51541 |
| Cost of a loft conversion | £29445 |
| Build a kitchen extension | £41541 |
| Build a hip to gable loft conversion | £41541 |
| Build a granny annexe | £86541 |
| Build a garden office | £9541 |
| Convert a garage | £15541 |
| Build a new garage | £18041 |
| Build a flat roof extension | £21541 |
| Build a dormer loft conversion | £41541 |
| Lay a concrete foundation | £5791 |
| Convert a bungalow loft | £28541 |
| Basement conversion cost | £32334 |