Extension builder estimates (based on hourly rates) to build a single storey extension in BS4
Range from the cheapest single storey extension £44720 (Concept Solutions Bristol Ltd based in BS15) to the dearest single storey extension £54800 (JM Building Services based in BS4).
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 BS4 by posting a job with HaMuch and we will send it to extension builders in BS4.
Estimates for common extension builder jobs in BS4;
| Job | Estimate |
| Underpinning a house | £17311 |
| Build a two storey extension | £87716 |
| Build a timber frame extension | £25811 |
| Install a swimming pool | £80811 |
| Cost to build a single storey extension | £46211 |
| Cost to build a side return extension | £35369 |
| Install an RSJ | £2011 |
| Build an outbuilding | £9811 |
| Build a mansard loft conversion | £51811 |
| Cost of a loft conversion | £31974 |
| Build a kitchen extension | £41811 |
| Build a hip to gable loft conversion | £41811 |
| Build a granny annexe | £86811 |
| Build a garden office | £9811 |
| Convert a garage | £15811 |
| Build a flat roof extension | £21811 |
| Build a dormer loft conversion | £41811 |
| Lay a concrete foundation | £6061 |
| Convert a bungalow loft | £28811 |
| Basement conversion cost | £35369 |