Extension builder estimates (based on hourly rates) to build a single storey extension in M31
Range from the cheapest single storey extension £35600 (Building Maintenance Services based in M44) to the dearest single storey extension £43280 (Coul Construction based in WA16).
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 M31 by posting a job with HaMuch and we will send it to extension builders in M31.
Estimates for common extension builder jobs in M31;
| Job | Estimate |
| Underpinning a house | £17098 |
| Build a two storey extension | £87397 |
| Build a timber frame extension | £25598 |
| Install a swimming pool | £80598 |
| Cost to build a single storey extension | £41962 |
| Cost to build a side return extension | £32978 |
| Install an RSJ | £1798 |
| Build an outbuilding | £9598 |
| Build a mansard loft conversion | £51598 |
| Cost of a loft conversion | £29982 |
| Build a kitchen extension | £41598 |
| Build a hip to gable loft conversion | £41598 |
| Build a granny annexe | £86598 |
| Build a garden office | £9598 |
| Convert a garage | £15598 |
| Build a new garage | £18098 |
| Build a flat roof extension | £21598 |
| Build a dormer loft conversion | £41598 |
| Lay a concrete foundation | £5848 |
| Convert a bungalow loft | £28598 |
| Basement conversion cost | £32978 |