Range from the cheapest single storey extension £31440 (Extended living by Gilbert-Ash based in BT12) to the dearest single storey extension £33040 (AK Building Services based in BT8).
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 BT17 by posting a job with HaMuch and we will send it to extension builders in BT17.
18/02/2024
Single storey extension
Job | Estimate |
Underpinning a house | £16592 |
Build a two storey extension | £86638 |
Build a timber frame extension | £25092 |
Install a swimming pool | £80092 |
Cost to build a single storey extension | £31837 |
Cost to build a side return extension | £27283 |
Install an RSJ | £1292 |
Build an outbuilding | £9092 |
Build a mansard loft conversion | £51092 |
Cost of a loft conversion | £25236 |
Build a kitchen extension | £41092 |
Build a hip to gable loft conversion | £41092 |
Build a granny annexe | £86092 |
Build a garden office | £9092 |
Convert a garage | £15092 |
Build a new garage | £17592 |
Build a flat roof extension | £21092 |
Build a dormer loft conversion | £41092 |
Lay a concrete foundation | £5342 |
Convert a bungalow loft | £28092 |
Basement conversion cost | £27283 |