Range from the cheapest single storey extension £43440 (Dell Developments Ltd based in SO18) to the dearest single storey extension £46320 (KT Carpentry & Building Services based in SO16).
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 Southampto by posting a job with HaMuch and we will send it to extension builders in Southampto.
17/10/2023
Single storey extension
04/02/2024
Single storey extension, bricks and roof only
Job | Estimate |
Underpinning a house | £17228 |
Build a two storey extension | £87592 |
Build a timber frame extension | £25728 |
Install a swimming pool | £80728 |
Cost to build a single storey extension | £44560 |
Cost to build a side return extension | £34440 |
Install an RSJ | £1928 |
Build an outbuilding | £9728 |
Build a mansard loft conversion | £51728 |
Cost of a loft conversion | £31200 |
Build a kitchen extension | £41728 |
Build a hip to gable loft conversion | £41728 |
Build a granny annexe | £86728 |
Build a garden office | £9728 |
Convert a garage | £15728 |
Build a new garage | £18228 |
Build a flat roof extension | £21728 |
Build a dormer loft conversion | £41728 |
Lay a concrete foundation | £5978 |
Convert a bungalow loft | £28728 |
Basement conversion cost | £34440 |