Extension builder estimates (based on hourly rates) to build a single storey extension in TN21
Range from the cheapest single storey extension £42000 (DE LELLIS CONSTRUCTION LTD based in TN22) to the dearest single storey extension £50000 (Angels Roofing based in BN27).
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 TN21 by posting a job with HaMuch and we will send it to extension builders in TN21.
Estimates for common extension builder jobs in TN21;
| Job | Estimate |
| Underpinning a house | £17262 |
| Build a two storey extension | £87643 |
| Build a timber frame extension | £25762 |
| Install a swimming pool | £80762 |
| Cost to build a single storey extension | £45245 |
| Cost to build a side return extension | £34825 |
| Install an RSJ | £1962 |
| Build an outbuilding | £9762 |
| Build a mansard loft conversion | £51762 |
| Cost of a loft conversion | £31521 |
| Build a kitchen extension | £41762 |
| Build a hip to gable loft conversion | £41762 |
| Build a granny annexe | £86762 |
| Build a garden office | £9762 |
| Convert a garage | £15762 |
| Build a new garage | £18262 |
| Build a flat roof extension | £21762 |
| Build a dormer loft conversion | £41762 |
| Lay a concrete foundation | £6012 |
| Convert a bungalow loft | £28762 |
| Basement conversion cost | £34825 |