Extension builder estimates (based on hourly rates) to build a single storey extension in SW17
Range from the cheapest single storey extension £34000 (Atlantis Construction based in SW17) to the dearest single storey extension £48880 (Barnes Design based in SW17).
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 SW17 by posting a job with HaMuch and we will send it to extension builders in SW17.
Estimates for common extension builder jobs in SW17;
| Job | Estimate |
| Underpinning a house | £17343 |
| Build a two storey extension | £87765 |
| Build a timber frame extension | £25843 |
| Install a swimming pool | £80843 |
| Cost to build a single storey extension | £46864 |
| Cost to build a side return extension | £35736 |
| Install an RSJ | £2043 |
| Build an outbuilding | £9843 |
| Build a mansard loft conversion | £51843 |
| Cost of a loft conversion | £32280 |
| Build a kitchen extension | £41843 |
| Build a hip to gable loft conversion | £41843 |
| Build a granny annexe | £86843 |
| Build a garden office | £9843 |
| Convert a garage | £15843 |
| Build a flat roof extension | £21843 |
| Build a dormer loft conversion | £41843 |
| Lay a concrete foundation | £6093 |
| Convert a bungalow loft | £28843 |
| Basement conversion cost | £35736 |