Extension builder estimates (based on hourly rates) to build a single storey extension in SE4
Range from the cheapest single storey extension £42000 (Total Home Refurbishments Ltd based in SE13) to the dearest single storey extension £48880 (Blitbolt ltd based in SE4).
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 SE4 by posting a job with HaMuch and we will send it to extension builders in SE4.
Estimates for common extension builder jobs in SE4;
| Job | Estimate |
| Underpinning a house | £17378 |
| Build a two storey extension | £87817 |
| Build a timber frame extension | £25878 |
| Install a swimming pool | £80878 |
| Cost to build a single storey extension | £47555 |
| Cost to build a side return extension | £36125 |
| Install an RSJ | £2078 |
| Build an outbuilding | £9878 |
| Build a mansard loft conversion | £51878 |
| Cost of a loft conversion | £32604 |
| Build a kitchen extension | £41878 |
| Build a hip to gable loft conversion | £41878 |
| Build a granny annexe | £86878 |
| Build a garden office | £9878 |
| Convert a garage | £15878 |
| Build a new garage | £18378 |
| Build a flat roof extension | £21878 |
| Build a dormer loft conversion | £41878 |
| Lay a concrete foundation | £6128 |
| Convert a bungalow loft | £28878 |
| Basement conversion cost | £36125 |