Extension builder estimates (based on hourly rates) to build a single storey extension in S40
Range from the cheapest single storey extension £34000 (R Watson Builders based in S43) to the dearest single storey extension £170000 (C S Roofing & Building based in S8).
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 S40 by posting a job with HaMuch and we will send it to extension builders in S40.
Estimates for common extension builder jobs in S40;
| Job | Estimate |
| Underpinning a house | £17542 |
| Build a two storey extension | £88063 |
| Build a timber frame extension | £26042 |
| Install a swimming pool | £81042 |
| Cost to build a single storey extension | £50845 |
| Cost to build a side return extension | £37975 |
| Install an RSJ | £2242 |
| Build an outbuilding | £10042 |
| Build a mansard loft conversion | £52042 |
| Cost of a loft conversion | £34146 |
| Build a kitchen extension | £42042 |
| Build a hip to gable loft conversion | £42042 |
| Build a granny annexe | £87042 |
| Build a garden office | £10042 |
| Convert a garage | £16042 |
| Build a new garage | £18542 |
| Build a flat roof extension | £22042 |
| Build a dormer loft conversion | £42042 |
| Lay a concrete foundation | £6292 |
| Convert a bungalow loft | £29042 |
| Basement conversion cost | £37975 |