From £1,952
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,856
H TIMMINS BUILDING & MAINT is an established extension buildering business in M18. We come highly recommended and provide competitive quotes for yo...
From £2,056
Cornerstone Building Maintenance & Restoration Ltd is an established and experienced local extension builder in M18. Please contact us for a free, ...
From £1,936
Need to find an Extension Builder near you for all your extension buildering work?
J K S Builder provides a local, trusted extension builde...
From £2,136
Trusted and professional extension builder in M18. Experienced in all extension buildering work and keeping within budget and on quote. AD Installa...
From £1,920
Trusted and professional extension builder in M18. Experienced in all extension buildering work and keeping within budget and on quote. M A Buildin...
From £1,872
Sale Moor Roofing & Building Contractors is a trusted extension builder serving customers in M18 and the surrounding area. Contact us to today to g...
From £2,032
Need to find an Extension Builder near you for all your extension buildering work?
Oscar Renn provides a local, trusted extension builderin...
From £1,968
Trusted and professional extension builder in M18. Experienced in all extension buildering work and keeping within budget and on quote. B R M S hav...
From £1,992
SJD Joinery & Building are here to help customers who need an Extension Builder in M18. We offer a competitive rate to complete all your extension ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in M18 it ranges from £1,856 (H TIMMINS BUILDING & MAINT based in M18) to £2,136 (AD Installation based in M13).
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 M18 by posting a job with HaMuch and we will send it to extension builders in M18.
"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
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Reddish | £34 | £235 |
| Install An RSJ near Droylsden | £34 | £237 |
| Install An RSJ near Denton | £35 | £233 |
| Install An RSJ near Failsworth | £35 | £235 |
| Install An RSJ near Manchester | £32 | £236 |
| Install An RSJ near Dukinfield | £35 | £231 |
| Install An RSJ near Tameside | £35 | £231 |
| Install An RSJ near Old Trafford | £32 | £236 |
| Install An RSJ near Ashton-under-Lyne | £36 | £231 |
| Install An RSJ near Hyde | £36 | £227 |
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 - £17,272

Two storey extension - £87,658

Build a timber frame extension - £25,772

Build a swimming pool - £80,772

Single storey extension - £50,440

Side return extension - £38,935

Install an RSJ - £1,972

Outbuilding - £9,772

Build a Mansard loft conversion - £51,772

Loft conversion - £31,613

Build a kitchen extension - £41,772

Hip to gable loft conversion - £41,772

Granny annexe - £86,772

Garden office - £9,772

Convert a Garage - £15,772

Garage - £18,272

Build a flat roof extension - £21,772

Build a dormer loft conversion - £41,772

Concrete foundations - £6,022

Convert a bungalow loft - £28,772

Convert a basement - £34,935