Extension builder estimates (based on hourly rates) to build a single storey extension in DN11
Range from the cheapest single storey extension £35600 (B Dale Building Construction Ltd based in DN3) to the dearest single storey extension £74000 (Green Exteriors Ltd based in S60).
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 DN11 by posting a job with HaMuch and we will send it to extension builders in DN11.
Estimates for common extension builder jobs in DN11;
| Job | Estimate |
| Underpinning a house | £17264 |
| Build a two storey extension | £87646 |
| Build a timber frame extension | £25764 |
| Install a swimming pool | £80764 |
| Cost to build a single storey extension | £45277 |
| Cost to build a side return extension | £34843 |
| Install an RSJ | £1964 |
| Build an outbuilding | £9764 |
| Build a mansard loft conversion | £51764 |
| Cost of a loft conversion | £31536 |
| Build a kitchen extension | £41764 |
| Build a hip to gable loft conversion | £41764 |
| Build a granny annexe | £86764 |
| Build a garden office | £9764 |
| Convert a garage | £15764 |
| Build a new garage | £18264 |
| Build a flat roof extension | £21764 |
| Build a dormer loft conversion | £41764 |
| Lay a concrete foundation | £6014 |
| Convert a bungalow loft | £28764 |
| Basement conversion cost | £34843 |