BTC Bernstef Ltd is an established extension buildering business in L9. We come highly recommended and provide competitive quotes for your work.
J.M.C Building Services is a trusted extension builder serving customers in L9 and the surrounding area. Contact us to today to get a competitive q...
Need an Extension Builder in L9? 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 L9. No obligation free quotes ...
CJ Construction are here to help customers who need an Extension Builder in L9. We offer a competitive rate to complete all your extension builderi...
Liverpool Builder is an established extension buildering business in L9. We come highly recommended and provide competitive quotes for your work.
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Relax... you have found a reliable extension builder in L9. KM Building Services is a friendly and reliable company based in L9 who consider no job...
Need to find an Extension Builder near you for all your extension buildering work?
Derek J Platt & Co provides a local, trusted extension b...
J J Nuttall Specialist Roofing Ltd are here to help customers who need an Extension Builder in L9. We offer a competitive rate to complete all your...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in L9 it ranges from £1,752 (Liverpool Builder based in L12) to £2,136 (P & P Building Services based in L11).
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 L9 by posting a job with HaMuch and we will send it to extension builders in L9.
"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 Bootle | £32 | £224 |
| Install An RSJ near Kirkby | £31 | £224 |
| Install An RSJ near Crosby | £33 | £223 |
| Install An RSJ near Maghull | £33 | £220 |
| Install An RSJ near Liverpool | £31 | £222 |
| Install An RSJ near Sefton | £33 | £221 |
| Install An RSJ near Wallasey | £32 | £224 |
| Install An RSJ near Knowsley | £31 | £222 |
| Install An RSJ near Birkenhead | £31 | £219 |
| Install An RSJ near Prescot | £31 | £223 |
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 - £17,258

Two storey extension - £87,636

Build a timber frame extension - £25,758

Build a swimming pool - £80,758

Single storey extension - £50,152

Side return extension - £38,773

Install an RSJ - £1,958

Outbuilding - £9,758

Build a Mansard loft conversion - £51,758

Loft conversion - £31,478

Build a kitchen extension - £41,758

Hip to gable loft conversion - £41,758

Granny annexe - £86,758

Garden office - £9,758

Convert a Garage - £15,758

Garage - £18,258

Build a flat roof extension - £21,758

Build a dormer loft conversion - £41,758

Concrete foundations - £6,008

Convert a bungalow loft - £28,758

Convert a basement - £34,773