Relax... you have found a reliable extension builder in Birkenhead. A.B Building Services Ltd is a friendly and reliable company based in Birkenhea...
Robuild - Waterwise is an established extension buildering business in Birkenhead. We come highly recommended and provide competitive quotes for yo...
Need an Extension Builder in Birkenhead? PK.Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Sean Mooney
SJBuild Ltd is an established and experienced local extension builder in Birkenhead. Please contact us for a free, no obligation quote and competit...
Need to find an Extension Builder near you for all your extension buildering work?
S.L.P Property Maintenance provides a local, trusted ext...
Trusted and professional extension builder in Birkenhead. Experienced in all extension buildering work and keeping within budget and on quote. DW B...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Danny Anderson
Danny Anderson Builder is an established extension buildering business in Birkenhead. We come highly recommended and provide competitive quotes for...
BTC Bernstef Ltd is an established extension buildering business in Birkenhead. We come highly recommended and provide competitive quotes for your ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Birkenhead it ranges from £1,592 (SJBuild Ltd based in CH63) to £2,152 (R J Property Maintenance & Repair based in CH63).
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 Birkenhead by posting a job with HaMuch and we will send it to extension builders in Birkenhead.
"RSJ installation" - LIVERPOOL, job posted 04/09/25
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Birkenhead | £31 | £219 |
| Install An RSJ near Wallasey | £32 | £224 |
| Install An RSJ near Liverpool | £31 | £222 |
| Install An RSJ near Wirral | £31 | £219 |
| Install An RSJ near Bebington | £31 | £222 |
| Install An RSJ near Bootle | £32 | £224 |
| Install An RSJ near Heswall | £30 | £213 |
| Install An RSJ near Crosby | £33 | £223 |
| Install An RSJ near Sefton | £33 | £221 |
| Install An RSJ near Kirkby | £31 | £224 |
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 - £17,235

Two storey extension - £87,603

Build a timber frame extension - £25,735

Build a swimming pool - £80,735

Single storey extension - £49,704

Side return extension - £38,521

Install an RSJ - £1,935

Outbuilding - £9,735

Build a Mansard loft conversion - £51,735

Loft conversion - £31,268

Build a kitchen extension - £41,735

Hip to gable loft conversion - £41,735

Granny annexe - £86,735

Garden office - £9,735

Convert a Garage - £15,735

Garage - £18,235

Build a flat roof extension - £21,735

Build a dormer loft conversion - £41,735

Concrete foundations - £5,985

Convert a bungalow loft - £28,735

Convert a basement - £34,521