BEANACRE BUILDERS LTD are here to help customers who need an Extension Builder in SN12. We offer a competitive rate to complete all your extension ...
From £2,272
Relax... you have found a reliable extension builder in SN12. TJ PROFESSIONAL BUILDERS T/A is a friendly and reliable company based in SN12 who con...
From £2,096
Our building services company TG Roofing and Construction was established over 10 years ago and have been helping customers throughout Wiltshire by...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SN12 it ranges from £2,096 (TG Roofing and Construction based in SN12) to £2,384 (BEANACRE BUILDERS LTD based in SN12).
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 SN12 by posting a job with HaMuch and we will send it to extension builders in SN12.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| 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 Devizes | £32 | £242 |
| Install An RSJ near Calne | £29 | £225 |
| Install An RSJ near Chippenham | £34 | £258 |
| Install An RSJ near Frome | £33 | £263 |
| Install An RSJ near Bath | £32 | £249 |
| Install An RSJ near Keynsham | £33 | £251 |
| Install An RSJ near Yate | £34 | £263 |
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 - £17,551

Two storey extension - £88,076

Build a timber frame extension - £26,051

Build a swimming pool - £81,051

Single storey extension - £56,013

Side return extension - £42,070

Install an RSJ - £2,251

Outbuilding - £10,051

Build a Mansard loft conversion - £52,051

Loft conversion - £34,225

Build a kitchen extension - £42,051

Hip to gable loft conversion - £42,051

Granny annexe - £87,051

Garden office - £10,051

Convert a Garage - £16,051

Garage - £18,551

Build a flat roof extension - £22,051

Build a dormer loft conversion - £42,051

Concrete foundations - £6,301

Convert a bungalow loft - £29,051

Convert a basement - £38,070