Extension builder estimates (based on hourly rates) to build a single storey extension in B13
Range from the cheapest single storey extension £38800 (West Heritage Bricklayers based in B90) to the dearest single storey extension £42480 (Kunda Group based in B15).
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 B13 by posting a job with HaMuch and we will send it to extension builders in B13.
Estimates for common extension builder jobs in B13;
| Job | Estimate |
| Underpinning a house | £17077 |
| Build a two storey extension | £87365 |
| Build a timber frame extension | £25577 |
| Install a swimming pool | £80577 |
| Cost to build a single storey extension | £41539 |
| Cost to build a side return extension | £32741 |
| Install an RSJ | £1777 |
| Build an outbuilding | £9577 |
| Build a mansard loft conversion | £51577 |
| Cost of a loft conversion | £29784 |
| Build a kitchen extension | £41577 |
| Build a hip to gable loft conversion | £41577 |
| Build a granny annexe | £86577 |
| Build a garden office | £9577 |
| Convert a garage | £15577 |
| Build a flat roof extension | £21577 |
| Build a dormer loft conversion | £41577 |
| Lay a concrete foundation | £5827 |
| Convert a bungalow loft | £28577 |
| Basement conversion cost | £32741 |