Khondda Olham
We agree on the work, price and appointment before starting. Our approach focuses on clear communication, punctuality, careful workmanship and leav...
Gary Wilson
Reliable person 25 years experience
if you look on a website rated people and have a look at my ratings
AJ Home Improvements is an established extension buildering business in B8. We come highly recommended and provide competitive quotes for your work...
Brickfast Builders is an established extension buildering business in B8. We come highly recommended and provide competitive quotes for your work.<...
Lloyd Clarke
Need to find an Extension Builder near you for all your extension buildering work?
LC BUILDING SERVICES provides a local, trusted extension...
Need to find an Extension Builder near you for all your extension buildering work?
John Kinloch Construction Ltd provides a local, trusted ...
Trusted and professional extension builder in B8. Experienced in all extension buildering work and keeping within budget and on quote. Castlehall B...
Guild Building Solutions Ltd is a well established, reliable and trustworthy company with over 25 years' experience. We are based in Sutton Coldfie...
Experienced extension builder ready to quote for your work. x10hosts is the best extension builder in B8. No obligation free quotes and many happy ...
From £2,096
Experienced extension builder ready to quote for your work. DM FLOYD BUILDING is the best extension builder in B8. No obligation free quotes and ma...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in B8 it ranges from £1,808 (John Kinloch Construction Ltd based in B36) to £2,248 (Darthy serices and cleaning based in B5).
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 B8 by posting a job with HaMuch and we will send it to extension builders in B8.
"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 | £28 | £226 |
| Install An RSJ near Sutton Coldfield | £29 | £228 |
| Install An RSJ near Smethwick | £29 | £225 |
| Install An RSJ near Solihull | £29 | £231 |
| Install An RSJ near Oldbury | £29 | £226 |
| Install An RSJ near West Bromwich | £28 | £225 |
| Install An RSJ near Sandwell | £29 | £228 |
| Install An RSJ near Halesowen | £28 | £225 |
| Install An RSJ near Rowley Regis | £29 | £225 |
| Install An RSJ near Knowle | £31 | £241 |
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 - £17,319

Two storey extension - £87,729

Build a timber frame extension - £25,819

Build a swimming pool - £80,819

Single storey extension - £51,384

Side return extension - £39,466

Install an RSJ - £2,019

Outbuilding - £9,819

Build a Mansard loft conversion - £51,819

Loft conversion - £32,055

Build a kitchen extension - £41,819

Hip to gable loft conversion - £41,819

Granny annexe - £86,819

Garden office - £9,819

Convert a Garage - £15,819

Garage - £18,319

Build a flat roof extension - £21,819

Build a dormer loft conversion - £41,819

Concrete foundations - £6,069

Convert a bungalow loft - £28,819

Convert a basement - £35,466