Extension builder estimates (based on hourly rates) to build a single storey extension in M35
Range from the cheapest single storey extension £34000 (D.r.m.brickwork based in OL6) to the dearest single storey extension £50000 (Goldcrest Finance based in M3).
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 M35 by posting a job with HaMuch and we will send it to extension builders in M35.
Estimates for common extension builder jobs in M35;
| Job | Estimate |
| Underpinning a house | £17110 |
| Build a two storey extension | £87414 |
| Build a timber frame extension | £25610 |
| Install a swimming pool | £80610 |
| Cost to build a single storey extension | £42192 |
| Cost to build a side return extension | £33108 |
| Install an RSJ | £1810 |
| Build an outbuilding | £9610 |
| Build a mansard loft conversion | £51610 |
| Cost of a loft conversion | £30090 |
| Build a kitchen extension | £41610 |
| Build a hip to gable loft conversion | £41610 |
| Build a granny annexe | £86610 |
| Build a garden office | £9610 |
| Convert a garage | £15610 |
| Build a new garage | £18110 |
| Build a flat roof extension | £21610 |
| Build a dormer loft conversion | £41610 |
| Lay a concrete foundation | £5860 |
| Convert a bungalow loft | £28610 |
| Basement conversion cost | £33108 |