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phoenix builders is a trusted extension builder serving customers in M1 and the surrounding area. Contact us to today to get a competitive quote fo...
Need to find an Extension Builder near you for all your extension buildering work?
J K S Builder provides a local, trusted extension builde...
Brookmeade Building is an established extension buildering business in M1. We come highly recommended and provide competitive quotes for your work....
Denis Gleeson is an established extension buildering business in M1. We come highly recommended and provide competitive quotes for your work.
Experienced extension builder ready to quote for your work. Advanced Builders & Roofers is the best extension builder in M1. No obligation free quo...
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...
Our building services company Silkrise Construction have ten years’ experience and have been helping customers in Manchester and the surrounding ...
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 ...
Need to find an Extension Builder near you for all your extension buildering work?
JM Builders Service provides a local, trusted extension ...
Cornerstone Building Maintenance & Restoration Ltd is an established and experienced local extension builder in M1. Please contact us for a free, n...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in M1 it ranges from £1,832 (Brookmeade Building based in M32) to £2,184 (Wholesale Clothing based in M8).
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 | £237 |
| Install An RSJ near Stretford | £32 | £239 |
| Install An RSJ near Droylsden | £34 | £237 |
| Install An RSJ near Prestwich | £31 | £233 |
| Install An RSJ near Failsworth | £35 | £236 |
| Install An RSJ near Reddish | £34 | £235 |
| Install An RSJ near Swinton | £32 | £234 |
| Install An RSJ near Eccles | £32 | £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 - £17,327

Two storey extension - £87,741

Build a timber frame extension - £25,827

Build a swimming pool - £80,827

Single storey extension - £51,544

Side return extension - £39,556

Install an RSJ - £2,027

Outbuilding - £9,827

Build a Mansard loft conversion - £51,827

Loft conversion - £32,130

Build a kitchen extension - £41,827

Hip to gable loft conversion - £41,827

Granny annexe - £86,827

Garden office - £9,827

Convert a Garage - £15,827

Garage - £18,327

Build a flat roof extension - £21,827

Build a dormer loft conversion - £41,827

Concrete foundations - £6,077

Convert a bungalow loft - £28,827

Convert a basement - £35,556