From £2,096
Experienced extension builder ready to quote for your work. George Davies Group Ltd is the best extension builder in BA12. No obligation free quote...
From £2,480
Need an Extension Builder in BA12? EMBERSON GENERAL BUILDERS has been helping local clients (20 mile radius) with their extension buildering jobs f...
From £2,064
Relax... you have found a reliable extension builder in BA12. Bryan Loveday Services Limited is a friendly and reliable company based in BA12 who c...
From £1,896
Need to find an Extension Builder near you for all your extension buildering work?
2 Counties Construction provides a local, trusted extens...
From £2,072
McIntosh DBR Ltd. is an established extension buildering business in BA12. We come highly recommended and provide competitive quotes for your work....
From £2,336
Experienced extension builder ready to quote for your work. Craft Renovations is the best extension builder in BA12. No obligation free quotes and ...
From £2,224
K E Sainsbury Builders is an established and experienced local extension builder in BA12. Please contact us for a free, no obligation quote and com...
From £2,480
Experienced extension builder ready to quote for your work. Burfitt and Garrett Ltd is the best extension builder in BA12. No obligation free quote...
From £2,280
Relax... you have found a reliable extension builder in BA12. HILLIER CONSTRUCTION is a friendly and reliable company based in BA12 who consider no...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in BA12 it ranges from £1,896 (2 Counties Construction based in SP3) to £2,496 (Prestige home improvements based in BA11).
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 BA12 by posting a job with HaMuch and we will send it to extension builders in BA12.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Frome | £33 | £263 |
| Install An RSJ near Trowbridge | £34 | £266 |
| Install An RSJ near Devizes | £32 | £242 |
| Install An RSJ near West Wiltshire | £32 | £242 |
| Install An RSJ near North Wiltshire | £32 | £242 |
| Install An RSJ near Bath | £32 | £249 |
| Install An RSJ near Salisbury | £35 | £247 |
| Install An RSJ near Calne | £29 | £225 |
| Install An RSJ near Keynsham | £33 | £251 |
| Install An RSJ near Chippenham | £34 | £258 |
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 - £17,542

Two storey extension - £88,064

Build a timber frame extension - £26,042

Build a swimming pool - £81,042

Single storey extension - £55,848

Side return extension - £41,977

Install an RSJ - £2,242

Outbuilding - £10,042

Build a Mansard loft conversion - £52,042

Loft conversion - £34,148

Build a kitchen extension - £42,042

Hip to gable loft conversion - £42,042

Granny annexe - £87,042

Garden office - £10,042

Convert a Garage - £16,042

Garage - £18,542

Build a flat roof extension - £22,042

Build a dormer loft conversion - £42,042

Concrete foundations - £6,292

Convert a bungalow loft - £29,042

Convert a basement - £37,977