Extension builder estimates (based on hourly rates) to build a single storey extension in SL9
Range from the cheapest single storey extension £46800 (Swan Windows & Son Limited based in WD3) to the dearest single storey extension £58000 (KATELL PROPERTY MAINTENANCE based in WD3).
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 SL9 by posting a job with HaMuch and we will send it to extension builders in SL9.
Estimates for common extension builder jobs in SL9;
| Job | Estimate |
| Underpinning a house | £17463 |
| Build a two storey extension | £87944 |
| Build a timber frame extension | £25963 |
| Install a swimming pool | £80963 |
| Cost to build a single storey extension | £49258 |
| Cost to build a side return extension | £37082 |
| Install an RSJ | £2163 |
| Build an outbuilding | £9963 |
| Build a mansard loft conversion | £51963 |
| Cost of a loft conversion | £33402 |
| Build a kitchen extension | £41963 |
| Build a hip to gable loft conversion | £41963 |
| Build a granny annexe | £86963 |
| Build a garden office | £9963 |
| Convert a garage | £15963 |
| Build a new garage | £18463 |
| Build a flat roof extension | £21963 |
| Build a dormer loft conversion | £41963 |
| Lay a concrete foundation | £6213 |
| Convert a bungalow loft | £28963 |
| Basement conversion cost | £37082 |