Extension builder estimates (based on hourly rates) to build a single storey extension in Great Britain
Range from the cheapest single storey extension £38800 (D H Evans based in DL8) to the dearest single storey extension £42480 (Yorkshire Lime & Clay based in HG3).
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 Great Britain by posting a job with HaMuch and we will send it to extension builders in Great Britain.
Estimates for common extension builder jobs in Great Britain;
| Job | Estimate |
| Underpinning a house | £17026 |
| Build a two storey extension | £87289 |
| Build a timber frame extension | £25526 |
| Install a swimming pool | £80526 |
| Cost to build a single storey extension | £40514 |
| Cost to build a side return extension | £32164 |
| Install an RSJ | £1726 |
| Build an outbuilding | £9526 |
| Build a mansard loft conversion | £51526 |
| Cost of a loft conversion | £29304 |
| Build a kitchen extension | £41526 |
| Build a hip to gable loft conversion | £41526 |
| Build a granny annexe | £86526 |
| Build a garden office | £9526 |
| Convert a garage | £15526 |
| Build a new garage | £18026 |
| Build a flat roof extension | £21526 |
| Build a dormer loft conversion | £41526 |
| Lay a concrete foundation | £5776 |
| Convert a bungalow loft | £28526 |
| Basement conversion cost | £32164 |
Rates for other Great Britain trades
Extension Builders in Great Britain
| Business name | Single storey extension cost |
|---|---|
| GURKHA CONSTRUCTION SVCS LTD, , DL10 | £40880 |
| Lee Construction (LDG) Ltd, , DL10 | £40720 |
| D H Evans, Bedale , DL8 | £38800 |
| Build, North Yorkshire, hg3 | £41520 |
| S & K Windows, Standard Way Industrial Estate, 9 Barker, DL6 | £40400 |
| Darren Collin Joinery, Northallerton , DL7 | £38800 |
| Yorkshire Lime & Clay, North Yorkshire, HG3 | £42480 |