Gary Wilson
Reliable person 25 years experience
if you look on a website rated people and have a look at my ratings
Andrew Bouton
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need to find an Extension Builder near you for all your extension buildering work?
Avonvale Garage Doors provides a local, trusted extensio...
AJ Home Improvements is an established extension buildering business in Kings Heath. We come highly recommended and provide competitive quotes for ...
Brickfast Builders is an established extension buildering business in Kings Heath. We come highly recommended and provide competitive quotes for yo...
Need to find an Extension Builder near you for all your extension buildering work?
Atwal Building Services Ltd provides a local, trusted ex...
Trusted and professional extension builder in Kings Heath. Experienced in all extension buildering work and keeping within budget and on quote. Bho...
Lloyd Clarke
Need to find an Extension Builder near you for all your extension buildering work?
LC BUILDING SERVICES provides a local, trusted extension...
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 Kings Heath. F.I.I Building Services Ltd is a friendly and reliable company based in Kings ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Kings Heath it ranges from £1,768 (Bhogal Construction based in B67) to £2,184 (Brickfast Builders based in B6).
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 Kings Heath by posting a job with HaMuch and we will send it to extension builders in Kings Heath.
"RSJ installation" - B90, job posted 03/08/26
"Total cost of structural engineer report, supply and install 6M RSJ for a load bearing wall to make kitchen/diner." - B90, job posted 01/11/25
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Solihull | £29 | £231 |
| Install An RSJ near Birmingham | £28 | £226 |
| Install An RSJ near Smethwick | £28 | £225 |
| Install An RSJ near Oldbury | £29 | £226 |
| Install An RSJ near Halesowen | £28 | £225 |
| Install An RSJ near Knowle | £31 | £241 |
| Install An RSJ near Rowley Regis | £29 | £225 |
| Install An RSJ near West Bromwich | £28 | £225 |
| Install An RSJ near Bromsgrove | £31 | £237 |
| Install An RSJ near Sutton Coldfield | £29 | £228 |
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 - £17,342

Two storey extension - £87,764

Build a timber frame extension - £25,842

Build a swimming pool - £80,842

Single storey extension - £51,848

Side return extension - £39,727

Install an RSJ - £2,042

Outbuilding - £9,842

Build a Mansard loft conversion - £51,842

Loft conversion - £32,273

Build a kitchen extension - £41,842

Hip to gable loft conversion - £41,842

Granny annexe - £86,842

Garden office - £9,842

Convert a Garage - £15,842

Garage - £18,342

Build a flat roof extension - £21,842

Build a dormer loft conversion - £41,842

Concrete foundations - £6,092

Convert a bungalow loft - £28,842

Convert a basement - £35,727