From £1,592
Ian Groves is an established extension buildering business in CA12. We come highly recommended and provide competitive quotes for your work.
From £1,720
Relax... you have found a reliable extension builder in CA12. M & K BUILDERS KESWICK LIMITED is a friendly and reliable company based in CA12 who c...
From £1,976
STAN MARTIN T/A are here to help customers who need an Extension Builder in CA12. We offer a competitive rate to complete all your extension builde...
From £1,560
Experienced extension builder ready to quote for your work. PAUL LITTLE BUILDING MAINT is the best extension builder in CA12. No obligation free qu...
From £1,440
Relax... you have found a reliable extension builder in CA12. ASKEW CONSTRUCTION is a friendly and reliable company based in CA12 who consider no j...
From £1,872
Need an Extension Builder in CA12? William king Construction has been helping local clients (20 mile radius) with their extension buildering jobs f...
From £1,912
Trusted and professional extension builder in CA12. Experienced in all extension buildering work and keeping within budget and on quote. J R S BUIL...
From £2,056
Sc brickwork is an established and experienced local extension builder in CA12. Please contact us for a free, no obligation quote and competitive r...
From £1,856
M c trading is an established extension buildering business in CA12. We come highly recommended and provide competitive quotes for your work.

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CA12 it ranges from £1,440 (ASKEW CONSTRUCTION based in CA4) to £2,056 (Sc brickwork based in CA22).
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 CA12 by posting a job with HaMuch and we will send it to extension builders in CA12.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Whitehaven | £22 | £221 |
| Install An RSJ near Carlisle | £24 | £204 |
| Install An RSJ near Kendal | £28 | £236 |
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 - £17,076

Two storey extension - £87,364

Build a timber frame extension - £25,576

Build a swimming pool - £80,576

Single storey extension - £46,520

Side return extension - £36,730

Install an RSJ - £1,776

Outbuilding - £9,576

Build a Mansard loft conversion - £51,576

Loft conversion - £29,775

Build a kitchen extension - £41,576

Hip to gable loft conversion - £41,576

Granny annexe - £86,576

Garden office - £9,576

Convert a Garage - £15,576

Garage - £18,076

Build a flat roof extension - £21,576

Build a dormer loft conversion - £41,576

Concrete foundations - £5,826

Convert a bungalow loft - £28,576

Convert a basement - £32,730