From £2,184
Fletcher's Building & Maintenance are a family owned business that understands, in order to achieve our continued success our customers and the...
From £2,184
Need to find an Extension Builder near you for all your extension buildering work?
Dayfos Properties Ltd provides a local, trusted extensio...
From £2,184
Trusted and professional extension builder in B11. Experienced in all extension buildering work and keeping within budget and on quote. 2nd Generat...
From £2,120
Experienced extension builder ready to quote for your work. x10hosts is the best extension builder in B11. No obligation free quotes and many happy...
From £1,896
Laurence Cox is an established and experienced local extension builder in B11. Please contact us for a free, no obligation quote and competitive ra...
From £1,928
Relax... you have found a reliable extension builder in B11. F.I.I Building Services Ltd is a friendly and reliable company based in B11 who consid...
From £1,792
Need to find an Extension Builder near you for all your extension buildering work?
JT Home Improvement provides a local, trusted extension ...
From £2,144
Need to find an Extension Builder near you for all your extension buildering work?
Avonvale Garage Doors provides a local, trusted extensio...
From £2,136
Kunda Group is a trusted extension builder serving customers in B11 and the surrounding area. Contact us to today to get a competitive quote for ex...
From £2,168
We are a forward thinking, award winning design and build company based in Solihull in the West Midlands. We strive to deliver the best experience ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in B11 it ranges from £1,792 (JT Home Improvement based in B14) to £2,184 (Fletchers Building & Maintenance, Ltd. based in B11).
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 B11 by posting a job with HaMuch and we will send it to extension builders in B11.
"Removal of 3 walls and 3 RSJ installations to extend a kitchen. Need for a structual engineering consultation and building control approval since at least one wall will be load bearing." - BIRMINGHAM, job posted 05/05/24
"RSJ installation" - BIRMINGHAM, job posted 01/03/25
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Birmingham | £29 | £227 |
| Install An RSJ near Solihull | £29 | £231 |
| Install An RSJ near Smethwick | £29 | £226 |
| Install An RSJ near Oldbury | £29 | £227 |
| Install An RSJ near Sutton Coldfield | £29 | £228 |
| Install An RSJ near Knowle | £31 | £241 |
| Install An RSJ near Halesowen | £29 | £227 |
| Install An RSJ near West Bromwich | £29 | £227 |
| Install An RSJ near Rowley Regis | £29 | £226 |
| Install An RSJ near Sandwell | £29 | £229 |
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 - £17,374

Two storey extension - £87,810

Build a timber frame extension - £25,874

Build a swimming pool - £80,874

Single storey extension - £52,472

Side return extension - £40,078

Install an RSJ - £2,074

Outbuilding - £9,874

Build a Mansard loft conversion - £51,874

Loft conversion - £32,565

Build a kitchen extension - £41,874

Hip to gable loft conversion - £41,874

Granny annexe - £86,874

Garden office - £9,874

Convert a Garage - £15,874

Garage - £18,374

Build a flat roof extension - £21,874

Build a dormer loft conversion - £41,874

Concrete foundations - £6,124

Convert a bungalow loft - £28,874

Convert a basement - £36,078