Extension builder estimates (based on hourly rates) to build a single storey extension in N8
Range from the cheapest single storey extension £38800 (Rafix Building based in N15) 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 N8 by posting a job with HaMuch and we will send it to extension builders in N8.
Estimates for common extension builder jobs in N8;
| Job | Estimate |
| Underpinning a house | £17422 |
| Build a two storey extension | £87883 |
| Build a timber frame extension | £25922 |
| Install a swimming pool | £80922 |
| Cost to build a single storey extension | £48445 |
| Cost to build a side return extension | £36625 |
| Install an RSJ | £2122 |
| Build an outbuilding | £9922 |
| Build a mansard loft conversion | £51922 |
| Cost of a loft conversion | £33021 |
| Build a kitchen extension | £41922 |
| Build a hip to gable loft conversion | £41922 |
| Build a granny annexe | £86922 |
| Build a garden office | £9922 |
| Convert a garage | £15922 |
| Build a new garage | £18422 |
| Build a flat roof extension | £21922 |
| Build a dormer loft conversion | £41922 |
| Lay a concrete foundation | £6172 |
| Convert a bungalow loft | £28922 |
| Basement conversion cost | £36625 |