Extension builder estimates (based on hourly rates) to build a single storey extension in EC4A
Range from the cheapest single storey extension £46960 (SCANDIIN based in EC1A) to the dearest single storey extension £74000 (Q Lofts and Extensions based in EC1R).
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 EC4A by posting a job with HaMuch and we will send it to extension builders in EC4A.
Estimates for common extension builder jobs in EC4A;
| Job | Estimate |
| Underpinning a house | £17440 |
| Build a two storey extension | £87911 |
| Build a timber frame extension | £25940 |
| Install a swimming pool | £80940 |
| Cost to build a single storey extension | £48810 |
| Cost to build a side return extension | £36830 |
| Install an RSJ | £2140 |
| Build an outbuilding | £9940 |
| Build a mansard loft conversion | £51940 |
| Cost of a loft conversion | £33192 |
| Build a kitchen extension | £41940 |
| Build a hip to gable loft conversion | £41940 |
| Build a granny annexe | £86940 |
| Build a garden office | £9940 |
| Convert a garage | £15940 |
| Build a new garage | £18440 |
| Build a flat roof extension | £21940 |
| Build a dormer loft conversion | £41940 |
| Lay a concrete foundation | £6190 |
| Convert a bungalow loft | £28940 |
| Basement conversion cost | £36830 |