From £2,328
STONEWALK CONSTRUCTION LTD is an established and experienced local extension builder in BA21. Please contact us for a free, no obligation quote and...
From £2,152
Experienced extension builder ready to quote for your work. ABS Abbott Preservation is the best extension builder in BA21. No obligation free quote...
From £2,456
TOTAL BUILDING SERVICES is an established extension buildering business in BA21. We come highly recommended and provide competitive quotes for your...
From £2,056
Firestone Surfacing Ltd is a trusted extension builder serving customers in BA21 and the surrounding area. Contact us to today to get a competitive...
From £2,064
Need to find an Extension Builder near you for all your extension buildering work?
Axminster Design and Build Limited provides a local, tru...
From £2,192
Adrian Fowler Property Maintenance & General Building is a trusted extension builder serving customers in BA21 and the surrounding area. Contact us...
From £2,384
Experienced extension builder ready to quote for your work. WILD CONSTRUCTION LTD is the best extension builder in BA21. No obligation free quotes ...
From £2,224
Experienced extension builder ready to quote for your work. LYME BAY BUILDING CO LTD is the best extension builder in BA21. No obligation free quot...
From £1,960
Ian Hunt Building Services is an established and experienced local extension builder in BA21. Please contact us for a free, no obligation quote and...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in BA21 it ranges from £1,728 (C O JOYCE LIMITED based in BA16) to £2,456 (TOTAL BUILDING SERVICES based in TA6).
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 BA21 by posting a job with HaMuch and we will send it to extension builders in BA21.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Yeovil | £34 | £294 |
| Install An RSJ near South Somerset | £62 | £270 |
| Install An RSJ near Dorchester | £30 | £230 |
| Install An RSJ near Bridgwater | £30 | £236 |
| Install An RSJ near Taunton | £31 | £242 |
| Install An RSJ near Weymouth | £33 | £260 |
| Install An RSJ near Frome | £33 | £263 |
| Install An RSJ near Bath | £32 | £249 |
| Install An RSJ near East Devon | £27 | £221 |
| Install An RSJ near Weston-super-Mare | £33 | £253 |
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 - £17,454

Two storey extension - £87,932

Build a timber frame extension - £25,954

Build a swimming pool - £80,954

Single storey extension - £54,088

Side return extension - £40,987

Install an RSJ - £2,154

Outbuilding - £9,954

Build a Mansard loft conversion - £51,954

Loft conversion - £33,323

Build a kitchen extension - £41,954

Hip to gable loft conversion - £41,954

Granny annexe - £86,954

Garden office - £9,954

Convert a Garage - £15,954

Garage - £18,454

Build a flat roof extension - £21,954

Build a dormer loft conversion - £41,954

Concrete foundations - £6,204

Convert a bungalow loft - £28,954

Convert a basement - £36,987