Range from the cheapest single storey extension £35600 (HMS Property based in ST7) to the dearest single storey extension £43760 (Bespoke based in St7).
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 ST12 by posting a job with HaMuch and we will send it to extension builders in ST12.
Job | Estimate |
Underpinning a house | £17072 |
Build a two storey extension | £87358 |
Build a timber frame extension | £25572 |
Install a swimming pool | £80572 |
Cost to build a single storey extension | £41437 |
Cost to build a side return extension | £32683 |
Install an RSJ | £1772 |
Build an outbuilding | £9572 |
Build a mansard loft conversion | £51572 |
Cost of a loft conversion | £29736 |
Build a kitchen extension | £41572 |
Build a hip to gable loft conversion | £41572 |
Build a granny annexe | £86572 |
Build a garden office | £9572 |
Convert a garage | £15572 |
Build a new garage | £18072 |
Build a flat roof extension | £21572 |
Build a dormer loft conversion | £41572 |
Lay a concrete foundation | £5822 |
Convert a bungalow loft | £28572 |
Basement conversion cost | £32683 |