Extension builder estimates (based on hourly rates) to build a single storey extension in Devon
Range from the cheapest single storey extension £30800 (RIDGE ROOF & BLDNG MAINT LTD based in EX14) to the dearest single storey extension £48880 (LYME BAY BUILDING CO LTD based in EX13).
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 Devon by posting a job with HaMuch and we will send it to extension builders in Devon.
Estimates for common extension builder jobs in Devon;
| Job | Estimate |
| Underpinning a house | £17030 |
| Build a two storey extension | £87295 |
| Build a timber frame extension | £25530 |
| Install a swimming pool | £80530 |
| Cost to build a single storey extension | £40598 |
| Cost to build a side return extension | £32212 |
| Install an RSJ | £1730 |
| Build an outbuilding | £9530 |
| Build a mansard loft conversion | £51530 |
| Cost of a loft conversion | £29343 |
| Build a kitchen extension | £41530 |
| Build a hip to gable loft conversion | £41530 |
| Build a granny annexe | £86530 |
| Build a garden office | £9530 |
| Convert a garage | £15530 |
| Build a new garage | £18030 |
| Build a flat roof extension | £21530 |
| Build a dormer loft conversion | £41530 |
| Lay a concrete foundation | £5780 |
| Convert a bungalow loft | £28530 |
| Basement conversion cost | £32212 |