Extension builder estimates (based on hourly rates) to build a single storey extension in NP23
Range from the cheapest single storey extension £20880 (Leon Morgan based in NP12) to the dearest single storey extension £42160 (JSP Building Contractors Ltd based in NP4).
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 NP23 by posting a job with HaMuch and we will send it to extension builders in NP23.
Estimates for common extension builder jobs in NP23;
| Job | Estimate |
| Underpinning a house | £16923 |
| Build a two storey extension | £87134 |
| Build a timber frame extension | £25423 |
| Install a swimming pool | £80423 |
| Cost to build a single storey extension | £38454 |
| Cost to build a side return extension | £31006 |
| Install an RSJ | £1623 |
| Build an outbuilding | £9423 |
| Build a mansard loft conversion | £51423 |
| Cost of a loft conversion | £28338 |
| Build a kitchen extension | £41423 |
| Build a hip to gable loft conversion | £41423 |
| Build a granny annexe | £86423 |
| Build a garden office | £9423 |
| Convert a garage | £15423 |
| Build a new garage | £17923 |
| Build a flat roof extension | £21423 |
| Build a dormer loft conversion | £41423 |
| Lay a concrete foundation | £5673 |
| Convert a bungalow loft | £28423 |
| Basement conversion cost | £31006 |