Range from the cheapest single storey extension £35600 (RBB Building Ltd based in CR4) to the dearest single storey extension £58000 (Ab plumbing based in Cr4).
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 Merton by posting a job with HaMuch and we will send it to extension builders in Merton.
Job | Estimate |
Underpinning a house | £17366 |
Build a two storey extension | £87799 |
Build a timber frame extension | £25866 |
Install a swimming pool | £80866 |
Cost to build a single storey extension | £47318 |
Cost to build a side return extension | £35992 |
Install an RSJ | £2066 |
Build an outbuilding | £9866 |
Build a mansard loft conversion | £51866 |
Cost of a loft conversion | £32493 |
Build a kitchen extension | £41866 |
Build a hip to gable loft conversion | £41866 |
Build a granny annexe | £86866 |
Build a garden office | £9866 |
Convert a garage | £15866 |
Build a new garage | £18366 |
Build a flat roof extension | £21866 |
Build a dormer loft conversion | £41866 |
Lay a concrete foundation | £6116 |
Convert a bungalow loft | £28866 |
Basement conversion cost | £35992 |