Range from the cheapest £15 per hour and £20 per day (London Design And Build based in SW1A) to the dearest £39 per hour and £243 per day (ALT CONSTRUCTION based in SW1W).
Comparing hourly and daily rates of Extension Builder's 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 - Click 'Get quotes' and describe your job and we will send it to your local extension builders for FREE.
See table for all Extension Builder rates in SW1W
At Alt Construction we provide a complete and professional turnkey construction service for internal alterations, extensions, including deta...
Job details | Estimate |
Underpinning a house | £1605 |
Build a two storey extension | £5348 |
Build a timber frame extension | £5348 |
Install a swimming pool | £3209 |
Cost to build a single storey extension | £42787 |
Cost to build a side return extension | £49205 |
Install an RSJ | £936 |
Build an outbuilding | £2139 |
Build a mansard loft conversion | £10697 |
Cost of a loft conversion | £29951 |
Build a kitchen extension | £10697 |
Build a hip to gable loft conversion | £8023 |
Build a granny annexe | £5348 |
Build a garden office | £2139 |
Convert a garage | £1070 |
Build a flat roof extension | £1818 |
Build a dormer loft conversion | £2139 |
Lay a concrete foundation | £2139 |
Convert a bungalow loft | £3209 |
Basement conversion cost | £29951 |