Range from the cheapest single storey extension £46960 (FLAVIA CONDE based in WC1N) to the dearest single storey extension £74000 (Q Lofts and Extensions based in EC1R).
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 London by posting a job with HaMuch and we will send it to extension builders in London.
Job | Estimate |
Underpinning a house | £17451 |
Build a two storey extension | £87927 |
Build a timber frame extension | £25951 |
Install a swimming pool | £80951 |
Cost to build a single storey extension | £49027 |
Cost to build a side return extension | £36953 |
Install an RSJ | £2151 |
Build an outbuilding | £9951 |
Build a mansard loft conversion | £51951 |
Cost of a loft conversion | £33294 |
Build a kitchen extension | £41951 |
Build a hip to gable loft conversion | £41951 |
Build a granny annexe | £86951 |
Build a garden office | £9951 |
Convert a garage | £15951 |
Build a new garage | £18451 |
Build a flat roof extension | £21951 |
Build a dormer loft conversion | £41951 |
Lay a concrete foundation | £6201 |
Convert a bungalow loft | £28951 |
Basement conversion cost | £36953 |