Extension builder estimates (based on hourly rates) to build a single storey extension in SY25
Range from the cheapest single storey extension £38800 (DRAGON CONSTRUCTION T/A based in SY25) to the dearest single storey extension £40400 (SP Coupland Ltd based in SY25).
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 SY25 by posting a job with HaMuch and we will send it to extension builders in SY25.
Estimates for common extension builder jobs in SY25;
| Job | Estimate |
| Underpinning a house | £16967 |
| Build a two storey extension | £87200 |
| Build a timber frame extension | £25467 |
| Install a swimming pool | £80467 |
| Cost to build a single storey extension | £39333 |
| Cost to build a side return extension | £31500 |
| Install an RSJ | £1667 |
| Build an outbuilding | £9467 |
| Build a mansard loft conversion | £51467 |
| Cost of a loft conversion | £28750 |
| Build a kitchen extension | £41467 |
| Build a hip to gable loft conversion | £41467 |
| Build a granny annexe | £86467 |
| Build a garden office | £9467 |
| Convert a garage | £15467 |
| Build a new garage | £17967 |
| Build a flat roof extension | £21467 |
| Build a dormer loft conversion | £41467 |
| Lay a concrete foundation | £5717 |
| Convert a bungalow loft | £28467 |
| Basement conversion cost | £31500 |
Rates for other SY25 trades
Extension Builders in SY25
| Business name | Single storey extension cost |
|---|---|
| SP Coupland Ltd, Sir Ceredigion, SY25 | £40400 |
| DRAGON CONSTRUCTION T/A, , SY25 | £38800 |
| Lippiatt Construction, Carmarthen, SA40 | £38800 |