Extension builder estimates (based on hourly rates) to build a single storey extension in Biggleswade
Range from the cheapest single storey extension £44880 (R&J Building Services Ltd based in SG17) to the dearest single storey extension £50800 (MG Design & Build based in SG5).
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 Biggleswade by posting a job with HaMuch and we will send it to extension builders in Biggleswade.
Estimates for common extension builder jobs in Biggleswade;
| Job | Estimate |
| Underpinning a house | £17416 |
| Build a two storey extension | £87875 |
| Build a timber frame extension | £25916 |
| Install a swimming pool | £80916 |
| Cost to build a single storey extension | £48330 |
| Cost to build a side return extension | £36560 |
| Install an RSJ | £2116 |
| Build an outbuilding | £9916 |
| Build a mansard loft conversion | £51916 |
| Cost of a loft conversion | £32967 |
| Build a kitchen extension | £41916 |
| Build a hip to gable loft conversion | £41916 |
| Build a granny annexe | £86916 |
| Build a garden office | £9916 |
| Convert a garage | £15916 |
| Build a new garage | £18416 |
| Build a flat roof extension | £21916 |
| Build a dormer loft conversion | £41916 |
| Lay a concrete foundation | £6166 |
| Convert a bungalow loft | £28916 |
| Basement conversion cost | £36560 |