From £1,720
Relax... you have found a reliable extension builder in Cockermouth. M & K BUILDERS KESWICK LIMITED is a friendly and reliable company based in Coc...
From £1,976
STAN MARTIN T/A are here to help customers who need an Extension Builder in Cockermouth. We offer a competitive rate to complete all your jobs to ...
From £1,592
Ian Groves is an established business in Cockermouth. We come highly recommended and provide competitive quotes for your work.
From £1,872
Need an Extension Builder in Cockermouth? William king Construction has been helping local clients (20 mile radius) with their jobs for many years...
From £1,560
Experienced extension builder ready to quote for your work. PAUL LITTLE BUILDING MAINT is the best extension builder in Cockermouth. No obligation ...
From £2,056
Sc brickwork is an established and experienced local extension builder in Cockermouth. Please contact us for a free, no obligation quote and compet...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Cockermouth it ranges from £1,560 (PAUL LITTLE BUILDING MAINT based in CA7) 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 Cockermouth by posting a job with HaMuch and we will send it to extension builders in Cockermouth.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Whitehaven | £18 | £185 |
| Install An RSJ near Carlisle | £21 | £175 |
| Install An RSJ near Dumfries | £18 | £140 |
| Install An RSJ near Dumfries & Galloway | £18 | £140 |
| Install An RSJ near Kendal | £24 | £200 |
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 - £17,096

Two storey extension - £87,394

Build a timber frame extension - £25,596

Build a swimming pool - £80,596

Single storey extension - £46,920

Side return extension - £36,955

Install an RSJ - £1,796

Outbuilding - £9,596

Build a Mansard loft conversion - £51,596

Loft conversion - £29,963

Build a kitchen extension - £41,596

Hip to gable loft conversion - £41,596

Granny annexe - £86,596

Garden office - £9,596

Convert a Garage - £15,596

Garage - £18,096

Build a flat roof extension - £21,596

Build a dormer loft conversion - £41,596

Concrete foundations - £5,846

Convert a bungalow loft - £28,596

Convert a basement - £32,955