Extension builder estimates (based on hourly rates) to build a single storey extension in Dorchester
Range from the cheapest single storey extension £34000 (Poundbury Build and Maintenance based in DT1) to the dearest single storey extension £75280 (Ashlar Historic Building Repairs based in DT6).
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 Dorchester by posting a job with HaMuch and we will send it to extension builders in Dorchester.
Estimates for common extension builder jobs in Dorchester;
| Job | Estimate |
| Underpinning a house | £17333 |
| Build a two storey extension | £87749 |
| Build a timber frame extension | £25833 |
| Install a swimming pool | £80833 |
| Cost to build a single storey extension | £46659 |
| Cost to build a side return extension | £35621 |
| Install an RSJ | £2033 |
| Build an outbuilding | £9833 |
| Build a mansard loft conversion | £51833 |
| Cost of a loft conversion | £32184 |
| Build a kitchen extension | £41833 |
| Build a hip to gable loft conversion | £41833 |
| Build a granny annexe | £86833 |
| Build a garden office | £9833 |
| Convert a garage | £15833 |
| Build a new garage | £18333 |
| Build a flat roof extension | £21833 |
| Build a dormer loft conversion | £41833 |
| Lay a concrete foundation | £6083 |
| Convert a bungalow loft | £28833 |
| Basement conversion cost | £35621 |