From £2,016
Need to find an Extension Builder near you for all your extension buildering work?
Lytham Driveways & Patios provides a local, trusted exte...
From £1,736
Need an Extension Builder in FY8? Tathams Joinery has been helping local clients (20 mile radius) with their extension buildering jobs for many yea...
From £2,144
JR roofing Lancs Limited is a family-run roofing contractor based in Blackpool, Lancashire. We pride ourselves on our excellent customer service an...
From £2,096
Experienced extension builder ready to quote for your work. George Hill & Sons is the best extension builder in FY8. No obligation free quotes and ...
From £1,776
Tekton Construction NW is an established extension buildering business in FY8. We come highly recommended and provide competitive quotes for your w...
From £2,048
Relax... you have found a reliable extension builder in FY8. Green Generation Builders Ltd is a friendly and reliable company based in FY8 who cons...
From £1,856
Broadfield construction is a trusted extension builder serving customers in FY8 and the surrounding area. Contact us to today to get a competitive ...
From £1,984
Fortis Construction & Development is a trusted extension builder serving customers in FY8 and the surrounding area. Contact us to today to get a co...
From £1,912
Smedley Construction Ltd is a trusted extension builder serving customers in FY8 and the surrounding area. Contact us to today to get a competitive...
From £1,712
Trusted and professional extension builder in FY8. Experienced in all extension buildering work and keeping within budget and on quote. Lords have ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in FY8 it ranges from £1,712 (Lords based in FY1) to £2,144 (JR Roofing Lancs based in FY4).
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 FY8 by posting a job with HaMuch and we will send it to extension builders in FY8.
"RSJ installation" - FY3
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Lytham St Annes | £25 | £181 |
| Install An RSJ near Blackpool | £25 | £183 |
| Install An RSJ near Southport | £23 | £174 |
| Install An RSJ near Penwortham | £26 | £189 |
| Install An RSJ near Fleetwood | £25 | £180 |
| Install An RSJ near Fulwood | £26 | £187 |
| Install An RSJ near Preston | £26 | £190 |
| Install An RSJ near Leyland | £27 | £194 |
| Install An RSJ near Formby | £20 | £145 |
| Install An RSJ near West Lancashire | £25 | £178 |
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 - £17,228

Two storey extension - £87,592

Build a timber frame extension - £25,728

Build a swimming pool - £80,728

Single storey extension - £49,560

Side return extension - £38,440

Install an RSJ - £1,928

Outbuilding - £9,728

Build a Mansard loft conversion - £51,728

Loft conversion - £31,200

Build a kitchen extension - £41,728

Hip to gable loft conversion - £41,728

Granny annexe - £86,728

Garden office - £9,728

Convert a Garage - £15,728

Garage - £18,228

Build a flat roof extension - £21,728

Build a dormer loft conversion - £41,728

Concrete foundations - £5,978

Convert a bungalow loft - £28,728

Convert a basement - £34,440