Extension builder estimates (based on hourly rates) to build a single storey extension in SY12
Range from the cheapest single storey extension £35600 (Richard Sherratt Builders Ltd based in SY5) to the dearest single storey extension £50000 (David Williams General Builder & Maintenance based in LL11).
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 SY12 by posting a job with HaMuch and we will send it to extension builders in SY12.
Estimates for common extension builder jobs in SY12;
| Job | Estimate |
| Underpinning a house | £17117 |
| Build a two storey extension | £87425 |
| Build a timber frame extension | £25617 |
| Install a swimming pool | £80617 |
| Cost to build a single storey extension | £42339 |
| Cost to build a side return extension | £33191 |
| Install an RSJ | £1817 |
| Build an outbuilding | £9617 |
| Build a mansard loft conversion | £51617 |
| Cost of a loft conversion | £30159 |
| Build a kitchen extension | £41617 |
| Build a hip to gable loft conversion | £41617 |
| Build a granny annexe | £86617 |
| Build a garden office | £9617 |
| Convert a garage | £15617 |
| Build a new garage | £18117 |
| Build a flat roof extension | £21617 |
| Build a dormer loft conversion | £41617 |
| Lay a concrete foundation | £5867 |
| Convert a bungalow loft | £28617 |
| Basement conversion cost | £33191 |