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Select an affordable extension builder
David Mather
Small brickwork jobs welcome.garden wall's and pointing as well.any type of walls built.
Shehele
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
I teach others on how to achieve flawless finishes through my blog on my website. i also am a stickler for perfection. I'm very friendly and punctu...
Relax... you have found a reliable extension builder in Crumpsall. CM BUILDING SERVICES is a friendly and reliable company based in Crumpsall who c...
phoenix builders is a trusted extension builder serving customers in Crumpsall and the surrounding area. Contact us to today to get a competitive q...
Need to find an Extension Builder near you for all your extension buildering work?
J K S Builder provides a local, trusted extension builde...
McClean Builders are here to help customers who need an Extension Builder in Crumpsall. We offer a competitive rate to complete all your extension ...
Trusted and professional extension builder in Crumpsall. Experienced in all extension buildering work and keeping within budget and on quote. We Bu...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Crumpsall it ranges from £1,384 (Valdecor based in OL8) to £2,168 (Phoenix builders based in m40).
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 Crumpsall by posting a job with HaMuch and we will send it to extension builders in Crumpsall.
"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 Prestwich | £31 | £233 |
| Install An RSJ near Salford | £32 | £237 |
| Install An RSJ near Whitefield | £31 | £229 |
| Install An RSJ near Middleton | £31 | £227 |
| Install An RSJ near Failsworth | £35 | £236 |
| Install An RSJ near Old Trafford | £32 | £236 |
| Install An RSJ near Swinton | £32 | £234 |
| Install An RSJ near Droylsden | £34 | £237 |
| Install An RSJ near Chadderton | £31 | £225 |
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 - £17,228

Two storey extension - £87,592

Build a timber frame extension - £25,728

Build a swimming pool - £80,728

Single storey extension - £49,560

Side return extension - £38,440

Install an RSJ - £1,928

Outbuilding - £9,728

Build a Mansard loft conversion - £51,728

Loft conversion - £31,200

Build a kitchen extension - £41,728

Hip to gable loft conversion - £41,728

Granny annexe - £86,728

Garden office - £9,728

Convert a Garage - £15,728

Garage - £18,228

Build a flat roof extension - £21,728

Build a dormer loft conversion - £41,728

Concrete foundations - £5,978

Convert a bungalow loft - £28,728

Convert a basement - £34,440