Extension builder estimates (based on hourly rates) to build a single storey extension in EN5
Range from the cheapest single storey extension £38800 (J&K Expert Building Services based in EN5) to the dearest single storey extension £49200 (The Hadley Loft Company Ltd based in EN5).
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 EN5 by posting a job with HaMuch and we will send it to extension builders in EN5.
Estimates for common extension builder jobs in EN5;
| Job | Estimate |
| Underpinning a house | £17356 |
| Build a two storey extension | £87784 |
| Build a timber frame extension | £25856 |
| Install a swimming pool | £80856 |
| Cost to build a single storey extension | £47126 |
| Cost to build a side return extension | £35884 |
| Install an RSJ | £2056 |
| Build an outbuilding | £9856 |
| Build a mansard loft conversion | £51856 |
| Cost of a loft conversion | £32403 |
| Build a kitchen extension | £41856 |
| Build a hip to gable loft conversion | £41856 |
| Build a granny annexe | £86856 |
| Build a garden office | £9856 |
| Convert a garage | £15856 |
| Build a flat roof extension | £21856 |
| Build a dormer loft conversion | £41856 |
| Lay a concrete foundation | £6106 |
| Convert a bungalow loft | £28856 |
| Basement conversion cost | £35884 |