SMH Build & Renovate is an established extension buildering business in Prestwich. We come highly recommended and provide competitive quotes for yo...
Paul Foran
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need an Extension Builder in Prestwich? MK Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many y...
Amak Construction is an established and experienced local extension builder in Prestwich. Please contact us for a free, no obligation quote and com...
Experienced extension builder ready to quote for your work. Advanced Builders & Roofers is the best extension builder in Prestwich. No obligation f...
Homeowners look no further if you want a qualified extension builder to work in your home. T K O Kitchens & Construction are tidy and neat, providi...
Trusted and professional extension builder in Prestwich. Experienced in all extension buildering work and keeping within budget and on quote. Fit-o...
Need to find an Extension Builder near you for all your extension buildering work?
DC Contractors provides a local, trusted extension build...
Relax... you have found a reliable extension builder in Prestwich. David Anderson Builders is a friendly and reliable company based in Prestwich wh...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Prestwich it ranges from £1,160 (Aquatec Builder based in OL10) to £2,248 (Northern Garage Conversion based in OL9).
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 Prestwich by posting a job with HaMuch and we will send it to extension builders in Prestwich.
"Install an RSJ" - M27, job posted 09/02/26
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Prestwich | £31 | £233 |
| Install An RSJ near Whitefield | £31 | £229 |
| Install An RSJ near Swinton | £32 | £234 |
| Install An RSJ near Salford | £32 | £237 |
| Install An RSJ near Radcliffe | £30 | £220 |
| Install An RSJ near Manchester | £32 | £236 |
| Install An RSJ near Middleton | £31 | £227 |
| Install An RSJ near Eccles | £32 | £236 |
| Install An RSJ near Bury | £30 | £219 |
| Install An RSJ near Heywood | £30 | £221 |
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 - £17,198

Two storey extension - £87,548

Build a timber frame extension - £25,698

Build a swimming pool - £80,698

Single storey extension - £48,968

Side return extension - £38,107

Install an RSJ - £1,898

Outbuilding - £9,698

Build a Mansard loft conversion - £51,698

Loft conversion - £30,923

Build a kitchen extension - £41,698

Hip to gable loft conversion - £41,698

Granny annexe - £86,698

Garden office - £9,698

Convert a Garage - £15,698

Garage - £18,198

Build a flat roof extension - £21,698

Build a dormer loft conversion - £41,698

Concrete foundations - £5,948

Convert a bungalow loft - £28,698

Convert a basement - £34,107