Extension builder estimates (based on hourly rates) to build a single storey extension in P1
Range from the cheapest single storey extension £42000 (BOXMOOR BLDG & CARP SERVICES based in HP1) to the dearest single storey extension £50000 (EB Construction & Building Ltd based in HP2).
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 P1 by posting a job with HaMuch and we will send it to extension builders in P1.
Estimates for common extension builder jobs in P1;
| Job | Estimate |
| Underpinning a house | £17398 |
| Build a two storey extension | £87847 |
| Build a timber frame extension | £25898 |
| Install a swimming pool | £80898 |
| Cost to build a single storey extension | £47965 |
| Cost to build a side return extension | £36355 |
| Install an RSJ | £2098 |
| Build an outbuilding | £9898 |
| Build a mansard loft conversion | £51898 |
| Cost of a loft conversion | £32796 |
| Build a kitchen extension | £41898 |
| Build a hip to gable loft conversion | £41898 |
| Build a granny annexe | £86898 |
| Build a garden office | £9898 |
| Convert a garage | £15898 |
| Build a new garage | £18398 |
| Build a flat roof extension | £21898 |
| Build a dormer loft conversion | £41898 |
| Lay a concrete foundation | £6148 |
| Convert a bungalow loft | £28898 |
| Basement conversion cost | £36355 |