Range from the cheapest single storey extension £31440 (Extended living by Gilbert-Ash based in BT12) to the dearest single storey extension £33200 (PC Building based in BT67).
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 Derry by posting a job with HaMuch and we will send it to extension builders in Derry.
Job | Estimate |
Underpinning a house | £16599 |
Build a two storey extension | £86648 |
Build a timber frame extension | £25099 |
Install a swimming pool | £80099 |
Cost to build a single storey extension | £31971 |
Cost to build a side return extension | £27359 |
Install an RSJ | £1299 |
Build an outbuilding | £9099 |
Build a mansard loft conversion | £51099 |
Cost of a loft conversion | £25299 |
Build a kitchen extension | £41099 |
Build a hip to gable loft conversion | £41099 |
Build a granny annexe | £86099 |
Build a garden office | £9099 |
Convert a garage | £15099 |
Build a new garage | £17599 |
Build a flat roof extension | £21099 |
Build a dormer loft conversion | £41099 |
Lay a concrete foundation | £5349 |
Convert a bungalow loft | £28099 |
Basement conversion cost | £27359 |