Extension builder estimates (based on hourly rates) to build a single storey extension in Southwark
Range from the cheapest single storey extension £46960 (Space Design Construction Services Ltd based in SE1) to the dearest single storey extension £48880 (Stanrock Building Services Ltd based in se1).
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 Southwark by posting a job with HaMuch and we will send it to extension builders in Southwark.
Estimates for common extension builder jobs in Southwark;
| Job | Estimate |
| Underpinning a house | £17389 |
| Build a two storey extension | £87833 |
| Build a timber frame extension | £25889 |
| Install a swimming pool | £80889 |
| Cost to build a single storey extension | £47773 |
| Cost to build a side return extension | £36247 |
| Install an RSJ | £2089 |
| Build an outbuilding | £9889 |
| Build a mansard loft conversion | £51889 |
| Cost of a loft conversion | £32706 |
| Build a kitchen extension | £41889 |
| Build a hip to gable loft conversion | £41889 |
| Build a granny annexe | £86889 |
| Build a garden office | £9889 |
| Convert a garage | £15889 |
| Build a new garage | £18389 |
| Build a flat roof extension | £21889 |
| Build a dormer loft conversion | £41889 |
| Lay a concrete foundation | £6139 |
| Convert a bungalow loft | £28889 |
| Basement conversion cost | £36247 |