Extension builder estimates (based on hourly rates) to build a single storey extension in Test Valley
Range from the cheapest single storey extension £26000 (Floortrak Limited based in SO51) to the dearest single storey extension £50000 (HEAT TECH based in SP11).
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 Test Valley by posting a job with HaMuch and we will send it to extension builders in Test Valley.
Estimates for common extension builder jobs in Test Valley;
| Job | Estimate |
| Underpinning a house | £17203 |
| Build a two storey extension | £87554 |
| Build a timber frame extension | £25703 |
| Install a swimming pool | £80703 |
| Cost to build a single storey extension | £44054 |
| Cost to build a side return extension | £34156 |
| Install an RSJ | £1903 |
| Build an outbuilding | £9703 |
| Build a mansard loft conversion | £51703 |
| Cost of a loft conversion | £30963 |
| Build a kitchen extension | £41703 |
| Build a hip to gable loft conversion | £41703 |
| Build a granny annexe | £86703 |
| Build a garden office | £9703 |
| Convert a garage | £15703 |
| Build a new garage | £18203 |
| Build a flat roof extension | £21703 |
| Build a dormer loft conversion | £41703 |
| Lay a concrete foundation | £5953 |
| Convert a bungalow loft | £28703 |
| Basement conversion cost | £34156 |