Range from the cheapest single storey extension £46800 (Design 2 Finish based in SW13) to the dearest single storey extension £48880 (New Line Construction Ltd based in W6).
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 Hammersmith by posting a job with HaMuch and we will send it to extension builders in Hammersmith.
Job | Estimate |
Underpinning a house | £17400 |
Build a two storey extension | £87850 |
Build a timber frame extension | £25900 |
Install a swimming pool | £80900 |
Cost to build a single storey extension | £47997 |
Cost to build a side return extension | £36373 |
Install an RSJ | £2100 |
Build an outbuilding | £9900 |
Build a mansard loft conversion | £51900 |
Cost of a loft conversion | £32811 |
Build a kitchen extension | £41900 |
Build a hip to gable loft conversion | £41900 |
Build a granny annexe | £86900 |
Build a garden office | £9900 |
Convert a garage | £15900 |
Build a new garage | £18400 |
Build a flat roof extension | £21900 |
Build a dormer loft conversion | £41900 |
Lay a concrete foundation | £6150 |
Convert a bungalow loft | £28900 |
Basement conversion cost | £36373 |