From £2,368
T&B Development are here to help customers who need an Extension Builder in SN14. We offer a competitive rate to complete all your extension builde...
From £2,360
, SN14
L F Replacement Windows Ltd T/A LF Replacement Windows and Conservator is an established and experienced local extension builder in SN14. Please co...
From £2,056
Need to find an Extension Builder near you for all your extension buildering work?
Cole Brind Property Services provides a local, trusted e...
From £2,416
Corella is a trusted extension builder serving customers in SN14 and the surrounding area. Contact us to today to get a competitive quote for exten...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SN14 it ranges from £2,056 (Cole Brind Property Services based in SN15) to £2,416 (Corella based in SN15).
Comparing extension builders estimates for fitting an RSJ gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
Get rates and quotes to install an RSJ in SN14 by posting a job with HaMuch and we will send it to extension builders in SN14.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Chippenham | £34 | £258 |
| Install An RSJ near Calne | £29 | £225 |
| Install An RSJ near Yate | £34 | £263 |
| Install An RSJ near Trowbridge | £34 | £266 |
| Install An RSJ near West Wiltshire | £32 | £242 |
| Install An RSJ near North Wiltshire | £32 | £242 |
| Install An RSJ near South Gloucestershire | £34 | £260 |
| Install An RSJ near Devizes | £32 | £242 |
| Install An RSJ near Kingswood | £34 | £257 |
| Install An RSJ near Keynsham | £33 | £251 |
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,600

Two storey extension - £88,150

Build a timber frame extension - £26,100

Build a swimming pool - £81,100

Single storey extension - £57,000

Side return extension - £42,625

Install an RSJ - £2,300

Outbuilding - £10,100

Build a Mansard loft conversion - £52,100

Loft conversion - £34,688

Build a kitchen extension - £42,100

Hip to gable loft conversion - £42,100

Granny annexe - £87,100

Garden office - £10,100

Convert a Garage - £16,100

Garage - £18,600

Build a flat roof extension - £22,100

Build a dormer loft conversion - £42,100

Concrete foundations - £6,350

Convert a bungalow loft - £29,100

Convert a basement - £38,625