From £1,960
CJ Construction are here to help customers who need an Extension Builder in L16. We offer a competitive rate to complete all your extension builder...
From £1,808
Relax... you have found a reliable extension builder in L16. R A C Gas is a friendly and reliable company based in L16 who consider no job as too b...
From £1,752
Liverpool Builder is an established extension buildering business in L16. We come highly recommended and provide competitive quotes for your work.<...
From £1,872
J.M.C Building Services is a trusted extension builder serving customers in L16 and the surrounding area. Contact us to today to get a competitive ...
From £1,904
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,968
Relax... you have found a reliable extension builder in L16. KM Building Services is a friendly and reliable company based in L16 who consider no j...
From £1,672
Trusted and professional extension builder in L16. Experienced in all extension buildering work and keeping within budget and on quote. Jones Lands...
From £2,176
Nathan Thomas Plumbing is an established extension buildering business in L16. We come highly recommended and provide competitive quotes for your w...
From £2,232
Tong Building & Joinery Ltd are here to help customers who need an Extension Builder in L16. We offer a competitive rate to complete all your exten...
From £2,256
AJ Solutions is an established extension buildering business in L16. We come highly recommended and provide competitive quotes for your work.

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in L16 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 L16 by posting a job with HaMuch and we will send it to extension builders in L16.
"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 Huyton with Roby | £31 | £225 |
| 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 Kirkby | £31 | £223 |
| Install An RSJ near Bootle | £32 | £223 |
| Install An RSJ near Birkenhead | £31 | £219 |
| Install An RSJ near Wallasey | £32 | £224 |
| Install An RSJ near Widnes | £31 | £220 |
| Install An RSJ near Bebington | £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 - £17,260

Two storey extension - £87,640

Build a timber frame extension - £25,760

Build a swimming pool - £80,760

Single storey extension - £50,200

Side return extension - £38,800

Install an RSJ - £1,960

Outbuilding - £9,760

Build a Mansard loft conversion - £51,760

Loft conversion - £31,500

Build a kitchen extension - £41,760

Hip to gable loft conversion - £41,760

Granny annexe - £86,760

Garden office - £9,760

Convert a Garage - £15,760

Garage - £18,260

Build a flat roof extension - £21,760

Build a dormer loft conversion - £41,760

Concrete foundations - £6,010

Convert a bungalow loft - £28,760

Convert a basement - £34,800