Robuild - Waterwise is an established extension buildering business in L1. We come highly recommended and provide competitive quotes for your work....
Need an Extension Builder in L1? PK.Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many years. G...
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 L1. Please contact us for a free, no obligation quote and competitive rate...
Need to find an Extension Builder near you for all your extension buildering work?
S.L.P Property Maintenance provides a local, trusted ext...
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 L1. We come highly recommended and provide competitive quotes for your wo...
J.M.C Building Services is a trusted extension builder serving customers in L1 and the surrounding area. Contact us to today to get a competitive q...
Need an Extension Builder in L1? Bob the Builder has been helping local clients (20 mile radius) with their extension buildering jobs for many year...
Peter Gallagher
Experienced extension builder ready to quote for your work. P & P Building Services is the best extension builder in L1. No obligation free quotes ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in L1 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 L1 by posting a job with HaMuch and we will send it to extension builders in L1.
"RSJ installation" - LIVERPOOL, job posted 04/09/25
"Install an RSJ" - L36, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Liverpool | £31 | £222 |
| Install An RSJ near Birkenhead | £31 | £219 |
| Install An RSJ near Wallasey | £32 | £224 |
| Install An RSJ near Bootle | £32 | £224 |
| Install An RSJ near Bebington | £31 | £222 |
| Install An RSJ near Wirral | £31 | £219 |
| Install An RSJ near Crosby | £33 | £223 |
| Install An RSJ near Kirkby | £31 | £224 |
| Install An RSJ near Huyton with Roby | £31 | £225 |
| Install An RSJ near Knowsley | £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 - £17,276

Two storey extension - £87,664

Build a timber frame extension - £25,776

Build a swimming pool - £80,776

Single storey extension - £50,520

Side return extension - £38,980

Install an RSJ - £1,976

Outbuilding - £9,776

Build a Mansard loft conversion - £51,776

Loft conversion - £31,650

Build a kitchen extension - £41,776

Hip to gable loft conversion - £41,776

Granny annexe - £86,776

Garden office - £9,776

Convert a Garage - £15,776

Garage - £18,276

Build a flat roof extension - £21,776

Build a dormer loft conversion - £41,776

Concrete foundations - £6,026

Convert a bungalow loft - £28,776

Convert a basement - £34,980