Extension builder estimates (based on hourly rates) to build a single storey extension in Derby
Range from the cheapest single storey extension £26000 (HUSKINSON CONSTR SRVCS LTD based in NG16) to the dearest single storey extension £58000 (COMPLETE BLDG & PLASTIC INSTA based in DE5).
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 Derby by posting a job with HaMuch and we will send it to extension builders in Derby.
Estimates for common extension builder jobs in Derby;
| Job | Estimate |
| Underpinning a house | £17153 |
| Build a two storey extension | £87480 |
| Build a timber frame extension | £25653 |
| Install a swimming pool | £80653 |
| Cost to build a single storey extension | £43069 |
| Cost to build a side return extension | £33601 |
| Install an RSJ | £1853 |
| Build an outbuilding | £9653 |
| Build a mansard loft conversion | £51653 |
| Cost of a loft conversion | £30501 |
| Build a kitchen extension | £41653 |
| Build a hip to gable loft conversion | £41653 |
| Build a granny annexe | £86653 |
| Build a garden office | £9653 |
| Convert a garage | £15653 |
| Build a flat roof extension | £21653 |
| Build a dormer loft conversion | £41653 |
| Lay a concrete foundation | £5903 |
| Convert a bungalow loft | £28653 |
| Basement conversion cost | £33601 |