From £1,936
Birkenhead, CH41
Trusted and professional extension builder in Birkenhead. Experienced in all extension buildering work and keeping within budget and on quote. MA R...
From £2,104
Glassrooms is an established extension buildering business in Birkenhead. We come highly recommended and provide competitive quotes for your work.<...
From £1,944
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,936
Need an Extension Builder in Birkenhead? PK.Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
From £2,096
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,864
Accro Building Services is an established extension buildering business in Birkenhead. We come highly recommended and provide competitive quotes fo...
From £2,048
Need to find an Extension Builder near you for all your extension buildering work?
S.L.P Property Maintenance provides a local, trusted ext...
From £2,112
Need to find an Extension Builder near you for all your extension buildering work?
PropertyPro provides a local, trusted extension builderi...
From £2,168
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,896
Robuild - Waterwise is an established extension buildering business in Birkenhead. We come highly recommended and provide competitive quotes for yo...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Birkenhead it ranges from £1,864 (Accro Building Services based in CH44) to £2,168 (Dbd based in L3).
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 | £33 | £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 | £223 |
| Install An RSJ near Heswall | £30 | £213 |
| Install An RSJ near Crosby | £34 | £223 |
| Install An RSJ near Sefton | £34 | £221 |
| Install An RSJ near Kirkby | £31 | £222 |
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 - £17,310

Two storey extension - £87,716

Build a timber frame extension - £25,810

Build a swimming pool - £80,810

Single storey extension - £51,208

Side return extension - £39,367

Install an RSJ - £2,010

Outbuilding - £9,810

Build a Mansard loft conversion - £51,810

Loft conversion - £31,973

Build a kitchen extension - £41,810

Hip to gable loft conversion - £41,810

Granny annexe - £86,810

Garden office - £9,810

Convert a Garage - £15,810

Garage - £18,310

Build a flat roof extension - £21,810

Build a dormer loft conversion - £41,810

Concrete foundations - £6,060

Convert a bungalow loft - £28,810

Convert a basement - £35,367