Extension builder estimates (based on hourly rates) to build a single storey extension in HP18
Range from the cheapest single storey extension £38800 (1994 based in OX26) to the dearest single storey extension £66000 (Land building services based in OX3).
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 HP18 by posting a job with HaMuch and we will send it to extension builders in HP18.
Estimates for common extension builder jobs in HP18;
| Job | Estimate |
| Underpinning a house | £17394 |
| Build a two storey extension | £87841 |
| Build a timber frame extension | £25894 |
| Install a swimming pool | £80894 |
| Cost to build a single storey extension | £47882 |
| Cost to build a side return extension | £36308 |
| Install an RSJ | £2094 |
| Build an outbuilding | £9894 |
| Build a mansard loft conversion | £51894 |
| Cost of a loft conversion | £32757 |
| Build a kitchen extension | £41894 |
| Build a hip to gable loft conversion | £41894 |
| Build a granny annexe | £86894 |
| Build a garden office | £9894 |
| Convert a garage | £15894 |
| Build a new garage | £18394 |
| Build a flat roof extension | £21894 |
| Build a dormer loft conversion | £41894 |
| Lay a concrete foundation | £6144 |
| Convert a bungalow loft | £28894 |
| Basement conversion cost | £36308 |