From £2,000
Falkirk, FK1
Relax... you have found a reliable extension builder in Falkirk. CAMS Construction is a friendly and reliable company based in Falkirk who consider...
From £2,088
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £424
Falkirk, FK5
We aim to provide quality workmanship on every job that will exceed your expectations. Our quotes are reasonable and competitive and we guarantee t...
From £2,216
Falkirk, FK2
GTM Construction (Falkirk) Limited is an established extension buildering business in Falkirk. We come highly recommended and provide competitive q...
From £2,240
Need an Extension Builder in Falkirk? DANIEL COX BUILDING SERVICES has been helping local clients (20 mile radius) with their extension buildering ...
From £2,008
Experienced extension builder ready to quote for your work. Paul Wilson Builders is the best extension builder in Falkirk. No obligation free quote...
From £2,344
Need an Extension Builder in Falkirk? D & G has been helping local clients (20 mile radius) with their extension buildering jobs for many years. Ge...
From £2,152
JLC BUILDERS are here to help customers who need an Extension Builder in Falkirk. We offer a competitive rate to complete all your extension builde...
From £1,952
RHM BUILDERS are here to help customers who need an Extension Builder in Falkirk. We offer a competitive rate to complete all your extension builde...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Falkirk it ranges from £424 (M&C JOINERS based in FK5) to £2,344 (D & G based in FK4).
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 Falkirk by posting a job with HaMuch and we will send it to extension builders in Falkirk.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Falkirk | £31 | £208 |
| Install An RSJ near Grangemouth | £32 | £214 |
| Install An RSJ near Bo'ness | £33 | £241 |
| Install An RSJ near Alloa | £33 | £229 |
| Install An RSJ near Bathgate | £28 | £214 |
| Install An RSJ near Cumbernauld | £31 | £234 |
| Install An RSJ near West Lothian | £33 | £242 |
| Install An RSJ near Airdrie | £31 | £238 |
| Install An RSJ near North Lanarkshire | £31 | £238 |
| 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 - £17,166

Two storey extension - £87,500

Build a timber frame extension - £25,666

Build a swimming pool - £80,666

Single storey extension - £48,328

Side return extension - £37,747

Install an RSJ - £1,866

Outbuilding - £9,666

Build a Mansard loft conversion - £51,666

Loft conversion - £30,623

Build a kitchen extension - £41,666

Hip to gable loft conversion - £41,666

Granny annexe - £86,666

Garden office - £9,666

Convert a Garage - £15,666

Garage - £18,166

Build a flat roof extension - £21,666

Build a dormer loft conversion - £41,666

Concrete foundations - £5,916

Convert a bungalow loft - £28,666

Convert a basement - £33,747