Extension builder estimates (based on hourly rates) to build a single storey extension in Chelmsford
Range from the cheapest single storey extension £42000 (Nigel Gresty Limited based in CM3) to the dearest single storey extension £50000 (Mr. based in CM1).
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 Chelmsford by posting a job with HaMuch and we will send it to extension builders in Chelmsford.
Estimates for common extension builder jobs in Chelmsford;
| Job | Estimate |
| Underpinning a house | £17281 |
| Build a two storey extension | £87672 |
| Build a timber frame extension | £25781 |
| Install a swimming pool | £80781 |
| Cost to build a single storey extension | £45622 |
| Cost to build a side return extension | £35038 |
| Install an RSJ | £1981 |
| Build an outbuilding | £9781 |
| Build a mansard loft conversion | £51781 |
| Cost of a loft conversion | £31698 |
| Build a kitchen extension | £41781 |
| Build a hip to gable loft conversion | £41781 |
| Build a granny annexe | £86781 |
| Build a garden office | £9781 |
| Convert a garage | £15781 |
| Build a flat roof extension | £21781 |
| Build a dormer loft conversion | £41781 |
| Lay a concrete foundation | £6031 |
| Convert a bungalow loft | £28781 |
| Basement conversion cost | £35038 |