Extension builder estimates (based on hourly rates) to build a single storey extension in B80
Range from the cheapest single storey extension £34000 (Cubit Contracts based in B98) to the dearest single storey extension £45200 (Prestige Conversions based in B97).
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 B80 by posting a job with HaMuch and we will send it to extension builders in B80.
Estimates for common extension builder jobs in B80;
| Job | Estimate |
| Underpinning a house | £17040 |
| Build a two storey extension | £87309 |
| Build a timber frame extension | £25540 |
| Install a swimming pool | £80540 |
| Cost to build a single storey extension | £40790 |
| Cost to build a side return extension | £32320 |
| Install an RSJ | £1740 |
| Build an outbuilding | £9540 |
| Build a mansard loft conversion | £51540 |
| Cost of a loft conversion | £29433 |
| Build a kitchen extension | £41540 |
| Build a hip to gable loft conversion | £41540 |
| Build a granny annexe | £86540 |
| Build a garden office | £9540 |
| Convert a garage | £15540 |
| Build a new garage | £18040 |
| Build a flat roof extension | £21540 |
| Build a dormer loft conversion | £41540 |
| Lay a concrete foundation | £5790 |
| Convert a bungalow loft | £28540 |
| Basement conversion cost | £32320 |