Range from the cheapest single storey extension £26000 (Karl Moore House Maintenance based in BT4) to the dearest single storey extension £34000 (N W Doyle & Son based in BT24).
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 Sydenham by posting a job with HaMuch and we will send it to extension builders in Sydenham.
18/02/2024
Single storey extension
Job | Estimate |
Underpinning a house | £16588 |
Build a two storey extension | £86632 |
Build a timber frame extension | £25088 |
Install a swimming pool | £80088 |
Cost to build a single storey extension | £31760 |
Cost to build a side return extension | £27240 |
Install an RSJ | £1288 |
Build an outbuilding | £9088 |
Build a mansard loft conversion | £51088 |
Cost of a loft conversion | £25200 |
Build a kitchen extension | £41088 |
Build a hip to gable loft conversion | £41088 |
Build a granny annexe | £86088 |
Build a garden office | £9088 |
Convert a garage | £15088 |
Build a new garage | £17588 |
Build a flat roof extension | £21088 |
Build a dormer loft conversion | £41088 |
Lay a concrete foundation | £5338 |
Convert a bungalow loft | £28088 |
Basement conversion cost | £27240 |