Extension builder estimates (based on hourly rates) to build a single storey extension in WD4
Range from the cheapest single storey extension £34000 (Garston Decor based in WD24) to the dearest single storey extension £58000 (Absolute kitchen and bathroom based in HP3).
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 WD4 by posting a job with HaMuch and we will send it to extension builders in WD4.
Estimates for common extension builder jobs in WD4;
| Job | Estimate |
| Underpinning a house | £17381 |
| Build a two storey extension | £87821 |
| Build a timber frame extension | £25881 |
| Install a swimming pool | £80881 |
| Cost to build a single storey extension | £47613 |
| Cost to build a side return extension | £36157 |
| Install an RSJ | £2081 |
| Build an outbuilding | £9881 |
| Build a mansard loft conversion | £51881 |
| Cost of a loft conversion | £32631 |
| Build a kitchen extension | £41881 |
| Build a hip to gable loft conversion | £41881 |
| Build a granny annexe | £86881 |
| Build a garden office | £9881 |
| Convert a garage | £15881 |
| Build a new garage | £18381 |
| Build a flat roof extension | £21881 |
| Build a dormer loft conversion | £41881 |
| Lay a concrete foundation | £6131 |
| Convert a bungalow loft | £28881 |
| Basement conversion cost | £36157 |