Range from the cheapest single storey extension £42000 (CS Construction & Conversions based in S65) to the dearest single storey extension £170000 (C S Roofing & Building based in S8).
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 S1 by posting a job with HaMuch and we will send it to extension builders in S1.
Job | Estimate |
Underpinning a house | £17634 |
Build a two storey extension | £88202 |
Build a timber frame extension | £26134 |
Install a swimming pool | £81134 |
Cost to build a single storey extension | £52688 |
Cost to build a side return extension | £39012 |
Install an RSJ | £2334 |
Build an outbuilding | £10134 |
Build a mansard loft conversion | £52134 |
Cost of a loft conversion | £35010 |
Build a kitchen extension | £42134 |
Build a hip to gable loft conversion | £42134 |
Build a granny annexe | £87134 |
Build a garden office | £10134 |
Convert a garage | £16134 |
Build a new garage | £18634 |
Build a flat roof extension | £22134 |
Build a dormer loft conversion | £42134 |
Lay a concrete foundation | £6384 |
Convert a bungalow loft | £29134 |
Basement conversion cost | £39012 |