From £2,584
We are a established company of over 30 yeats. We offer 24 hour call out service for both commercial and residential property sevices
From £3,536
CFM - Entire building care is an established and experienced local extension builder in St Marys. Please contact us for a free, no obligation quot...
From £2,128
Experienced extension builder ready to quote for your work. Andrew Allan Builder is the best extension builder in St Marys. No obligation free quot...
From £1,912
Hi i am first class tradesman which i will leave you 100% happy with the work carried out,i am also puncual in the mornings.never let any clients d...
From £2,600
Trusted and professional extension builder in St Marys. Experienced in all extension buildering work and keeping within budget and on quote. Bell &...
From £2,632
Trusted and professional extension builder in St Marys. Experienced in all extension buildering work and keeping within budget and on quote. Ames T...
From £2,448
Need to find an Extension Builder near you for all your extension buildering work?
D GARDINER CONSTRUCTION provides a local, trusted extens...
From £2,088
Experienced extension builder ready to quote for your work. REDSTONE CONSTRUCTION (TAYSIDE is the best extension builder in St Marys. No obligation...
From £2,160
J & G Builders are here to help customers who need an Extension Builder in St Marys. We offer a competitive rate to complete all your extension bui...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in St Marys it ranges from £1,912 (D.F.BUILDERS based in PH11) to £3,536 (CFM - Entire building care based in DD5).
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 St Marys by posting a job with HaMuch and we will send it to extension builders in St Marys.
"RSJ installation in old farmhouse to support sagging ceiling/bouncy floor. Near Arbroath." - DUNDEE, job posted 08/04/24
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Dundee | £38 | £285 |
| Install An RSJ near Forfar | £29 | £236 |
| Install An RSJ near Angus | £29 | £236 |
| Install An RSJ near Arbroath | £47 | £264 |
| Install An RSJ near Perth & Kinross | £32 | £245 |
| Install An RSJ near Perth | £32 | £245 |
| Install An RSJ near Fife | £44 | £310 |
| Install An RSJ near Glenrothes | £42 | £304 |
| Install An RSJ near Kirkcaldy | £42 | £296 |
| Install An RSJ near Dunfermline | £46 | £285 |
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 - £17,700

Two storey extension - £88,300

Build a timber frame extension - £26,200

Build a swimming pool - £81,200

Single storey extension - £59,000

Side return extension - £43,750

Install an RSJ - £2,400

Outbuilding - £10,200

Build a Mansard loft conversion - £52,200

Loft conversion - £35,625

Build a kitchen extension - £42,200

Hip to gable loft conversion - £42,200

Granny annexe - £87,200

Garden office - £10,200

Convert a Garage - £16,200

Garage - £18,700

Build a flat roof extension - £22,200

Build a dormer loft conversion - £42,200

Concrete foundations - £6,450

Convert a bungalow loft - £29,200

Convert a basement - £39,750