From £2,176
bespoke designers for your new media centre. At last, we’re bringing our stunning conversion knowledge to entertainment installations across the ...
From £2,000
Our building services company Silkrise Construction have ten years’ experience and have been helping customers in Manchester and the surrounding ...
From £1,808
Experienced extension builder ready to quote for your work. MyDestigo is the best extension builder in M1. No obligation free quotes and many happy...
From £2,160
Mode Projects Ltd is an established and experienced local extension builder in M1. Please contact us for a free, no obligation quote and competitiv...
From £2,096
Trusted and professional extension builder in M1. Experienced in all extension buildering work and keeping within budget and on quote. SK Building ...
From £2,272
Avon Piping Limited are here to help customers who need an Extension Builder in M1. We offer a competitive rate to complete all your extension buil...
From £2,280
Guardian Structural Ltd (Wall Removal Specialists) was created with one goal in mind.... To set the standards. We take pride in being highest rated...
From £2,144
Pillo rooms is a trusted extension builder serving customers in M1 and the surrounding area. Contact us to today to get a competitive quote for ext...
From £2,184
A wholesale shopping is an individual with a huge number of followers related to fashion and has the ability to influence the thought and purchase ...
From £1,968
Trusted and professional extension builder in M1. Experienced in all extension buildering work and keeping within budget and on quote. B R M S have...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in M1 it ranges from £1,808 (MyDestigo based in M1) to £2,280 (Guardian Structural Ltd (Wall Removal Specialists) based in M3).
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 M1 by posting a job with HaMuch and we will send it to extension builders in M1.
"RSJ installation replacing a badly installed RSJ that supports a wall between the old kitchen and rear lounge. The original builder installed the incorrect weight (not heavy enough) and then proceeded to put a suppirt bar underneath by welding. The weld buckled the beam and this is how its been..." - SK4, job posted 01/01/70
"Install an RSJ" - M27, job posted 09/02/26
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Manchester | £32 | £236 |
| Install An RSJ near Old Trafford | £32 | £236 |
| Install An RSJ near Salford | £32 | £238 |
| Install An RSJ near Stretford | £32 | £235 |
| Install An RSJ near Droylsden | £34 | £237 |
| Install An RSJ near Prestwich | £31 | £234 |
| Install An RSJ near Failsworth | £35 | £236 |
| Install An RSJ near Reddish | £34 | £236 |
| Install An RSJ near Swinton | £32 | £235 |
| Install An RSJ near Eccles | £32 | £237 |
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 - £17,409

Two storey extension - £87,863

Build a timber frame extension - £25,909

Build a swimming pool - £80,909

Single storey extension - £53,176

Side return extension - £40,474

Install an RSJ - £2,109

Outbuilding - £9,909

Build a Mansard loft conversion - £51,909

Loft conversion - £32,895

Build a kitchen extension - £41,909

Hip to gable loft conversion - £41,909

Granny annexe - £86,909

Garden office - £9,909

Convert a Garage - £15,909

Garage - £18,409

Build a flat roof extension - £21,909

Build a dormer loft conversion - £41,909

Concrete foundations - £6,159

Convert a bungalow loft - £28,909

Convert a basement - £36,474