Extension builder estimates (based on hourly rates) to build a single storey extension in N17
Range from the cheapest single storey extension £36400 (ADD CONSTRUCTION (LONDON) LTD based in N15) to the dearest single storey extension £48880 (Nicky Price based in N17).
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 N17 by posting a job with HaMuch and we will send it to extension builders in N17.
Estimates for common extension builder jobs in N17;
| Job | Estimate |
| Underpinning a house | £17309 |
| Build a two storey extension | £87713 |
| Build a timber frame extension | £25809 |
| Install a swimming pool | £80809 |
| Cost to build a single storey extension | £46179 |
| Cost to build a side return extension | £35351 |
| Install an RSJ | £2009 |
| Build an outbuilding | £9809 |
| Build a mansard loft conversion | £51809 |
| Cost of a loft conversion | £31959 |
| Build a kitchen extension | £41809 |
| Build a hip to gable loft conversion | £41809 |
| Build a granny annexe | £86809 |
| Build a garden office | £9809 |
| Convert a garage | £15809 |
| Build a flat roof extension | £21809 |
| Build a dormer loft conversion | £41809 |
| Lay a concrete foundation | £6059 |
| Convert a bungalow loft | £28809 |
| Basement conversion cost | £35351 |