Range from the cheapest single storey extension £46960 (JD Martin based in EN6) to the dearest single storey extension £49360 (Luna Construction Ltd based in al2).
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 Hertsmere by posting a job with HaMuch and we will send it to extension builders in Hertsmere.
Job | Estimate |
Underpinning a house | £17385 |
Build a two storey extension | £87828 |
Build a timber frame extension | £25885 |
Install a swimming pool | £80885 |
Cost to build a single storey extension | £47709 |
Cost to build a side return extension | £36211 |
Install an RSJ | £2085 |
Build an outbuilding | £9885 |
Build a mansard loft conversion | £51885 |
Cost of a loft conversion | £32676 |
Build a kitchen extension | £41885 |
Build a hip to gable loft conversion | £41885 |
Build a granny annexe | £86885 |
Build a garden office | £9885 |
Convert a garage | £15885 |
Build a new garage | £18385 |
Build a flat roof extension | £21885 |
Build a dormer loft conversion | £41885 |
Lay a concrete foundation | £6135 |
Convert a bungalow loft | £28885 |
Basement conversion cost | £36211 |