Extension builder estimates (based on hourly rates) to build a single storey extension in SE27
Range from the cheapest single storey extension £42000 (RCB Group Design & Build based in SE21) to the dearest single storey extension £90000 (Felix Building based in SW16).
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 SE27 by posting a job with HaMuch and we will send it to extension builders in SE27.
Estimates for common extension builder jobs in SE27;
| Job | Estimate |
| Underpinning a house | £17483 |
| Build a two storey extension | £87975 |
| Build a timber frame extension | £25983 |
| Install a swimming pool | £80983 |
| Cost to build a single storey extension | £49667 |
| Cost to build a side return extension | £37313 |
| Install an RSJ | £2183 |
| Build an outbuilding | £9983 |
| Build a mansard loft conversion | £51983 |
| Cost of a loft conversion | £33594 |
| Build a kitchen extension | £41983 |
| Build a hip to gable loft conversion | £41983 |
| Build a granny annexe | £86983 |
| Build a garden office | £9983 |
| Convert a garage | £15983 |
| Build a new garage | £18483 |
| Build a flat roof extension | £21983 |
| Build a dormer loft conversion | £41983 |
| Lay a concrete foundation | £6233 |
| Convert a bungalow loft | £28983 |
| Basement conversion cost | £37313 |