Extension builder estimates (based on hourly rates) to build a single storey extension in EN11
Range from the cheapest single storey extension £38800 (Mayfair Site Services Ltd based in CM19) to the dearest single storey extension £70000 (PDS Group Ltd based in EN10).
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 EN11 by posting a job with HaMuch and we will send it to extension builders in EN11.
Estimates for common extension builder jobs in EN11;
| Job | Estimate |
| Underpinning a house | £17444 |
| Build a two storey extension | £87916 |
| Build a timber frame extension | £25944 |
| Install a swimming pool | £80944 |
| Cost to build a single storey extension | £48880 |
| Cost to build a side return extension | £36870 |
| Install an RSJ | £2144 |
| Build an outbuilding | £9944 |
| Build a mansard loft conversion | £51944 |
| Cost of a loft conversion | £33225 |
| Build a kitchen extension | £41944 |
| Build a hip to gable loft conversion | £41944 |
| Build a granny annexe | £86944 |
| Build a garden office | £9944 |
| Convert a garage | £15944 |
| Build a new garage | £18444 |
| Build a flat roof extension | £21944 |
| Build a dormer loft conversion | £41944 |
| Lay a concrete foundation | £6194 |
| Convert a bungalow loft | £28944 |
| Basement conversion cost | £36870 |