Extension builder estimates (based on hourly rates) to build a single storey extension in W6
Range from the cheapest single storey extension £46640 (JNJ Building Services Ltd based in W12) to the dearest single storey extension £48880 (The Home Refurbishment Company based in W6).
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 W6 by posting a job with HaMuch and we will send it to extension builders in W6.
Estimates for common extension builder jobs in W6;
| Job | Estimate |
| Underpinning a house | £17400 |
| Build a two storey extension | £87850 |
| Build a timber frame extension | £25900 |
| Install a swimming pool | £80900 |
| Cost to build a single storey extension | £47997 |
| Cost to build a side return extension | £36373 |
| Install an RSJ | £2100 |
| Build an outbuilding | £9900 |
| Build a mansard loft conversion | £51900 |
| Cost of a loft conversion | £32811 |
| Build a kitchen extension | £41900 |
| Build a hip to gable loft conversion | £41900 |
| Build a granny annexe | £86900 |
| Build a garden office | £9900 |
| Convert a garage | £15900 |
| Build a flat roof extension | £21900 |
| Build a dormer loft conversion | £41900 |
| Lay a concrete foundation | £6150 |
| Convert a bungalow loft | £28900 |
| Basement conversion cost | £36373 |