From £2,176
Nathan Thomas Plumbing is an established extension buildering business in L11. We come highly recommended and provide competitive quotes for your w...
From £1,672
Trusted and professional extension builder in L11. Experienced in all extension buildering work and keeping within budget and on quote. Jones Lands...
From £1,872
J.M.C Building Services is a trusted extension builder serving customers in L11 and the surrounding area. Contact us to today to get a competitive ...
From £2,232
Tong Building & Joinery Ltd are here to help customers who need an Extension Builder in L11. We offer a competitive rate to complete all your exten...
From £2,256
AJ Solutions is an established extension buildering business in L11. We come highly recommended and provide competitive quotes for your work.
From £1,808
Relax... you have found a reliable extension builder in L11. R A C Gas is a friendly and reliable company based in L11 who consider no job as too b...
From £1,896
G P Roofing & Building Service is a trusted extension builder serving customers in L11 and the surrounding area. Contact us to today to get a compe...
From £1,992
EBI BUILDING RENOVATIONS is a trusted extension builder serving customers in L11 and the surrounding area. Contact us to today to get a competitive...
From £1,888
Experienced extension builder ready to quote for your work. BURGHWOOD CONSTRUCTION LTD is the best extension builder in L11. No obligation free quo...
From £1,968
Relax... you have found a reliable extension builder in L11. Crown Construction Lancs Ltd is a friendly and reliable company based in L11 who consi...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in L11 it ranges from £1,672 (Jones Landscaping based in L30) to £2,256 (AJ Solutions based in CH1).
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 L11 by posting a job with HaMuch and we will send it to extension builders in L11.
"Install an RSJ" - L36, job posted 01/01/70
"RSJ installation" - LIVERPOOL, job posted 04/09/25
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Kirkby | £31 | £223 |
| Install An RSJ near Bootle | £32 | £223 |
| Install An RSJ near Knowsley | £31 | £222 |
| Install An RSJ near Prescot | £31 | £223 |
| Install An RSJ near Liverpool | £31 | £222 |
| Install An RSJ near Huyton with Roby | £31 | £225 |
| Install An RSJ near Maghull | £33 | £219 |
| Install An RSJ near Crosby | £33 | £222 |
| Install An RSJ near Wallasey | £32 | £224 |
| Install An RSJ near Birkenhead | £31 | £219 |
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