Range from the cheapest single storey extension £35600 (Onyx Iv based in N11) to the dearest single storey extension £66000 (Romex Building Service based in N22).
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 Friern Barnet by posting a job with HaMuch and we will send it to extension builders in Friern Barnet.
Job | Estimate |
Underpinning a house | £17472 |
Build a two storey extension | £87958 |
Build a timber frame extension | £25972 |
Install a swimming pool | £80972 |
Cost to build a single storey extension | £49437 |
Cost to build a side return extension | £37183 |
Install an RSJ | £2172 |
Build an outbuilding | £9972 |
Build a mansard loft conversion | £51972 |
Cost of a loft conversion | £33486 |
Build a kitchen extension | £41972 |
Build a hip to gable loft conversion | £41972 |
Build a granny annexe | £86972 |
Build a garden office | £9972 |
Convert a garage | £15972 |
Build a new garage | £18472 |
Build a flat roof extension | £21972 |
Build a dormer loft conversion | £41972 |
Lay a concrete foundation | £6222 |
Convert a bungalow loft | £28972 |
Basement conversion cost | £37183 |