Need to find an Extension Builder near you for all your extension buildering work?
D Broomhall provides a local, trusted extension builderi...
Experienced extension builder ready to quote for your work. Plowman & Wood is the best extension builder in Harborne. No obligation free quotes and...
Oakham Brickwork is an established extension buildering business in Harborne. We come highly recommended and provide competitive quotes for your wo...
Relax... you have found a reliable extension builder in Harborne. Tucker Construction is a friendly and reliable company based in Harborne who cons...
SM&S General Property Repairs is a trusted extension builder serving customers in Harborne and the surrounding area. Contact us to today to get a c...
Wilson & Son is an established and experienced local extension builder in Harborne. Please contact us for a free, no obligation quote and competiti...
Need to find an Extension Builder near you for all your extension buildering work?
Michael Locke Garage Doors provides a local, trusted ext...
Trusted and professional extension builder in Harborne. Experienced in all extension buildering work and keeping within budget and on quote. D & S ...
Relax... you have found a reliable extension builder in Harborne. Platinum Build is a friendly and reliable company based in Harborne who consider ...
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For all your home renovation requirements, painting and decorating, Wallpapering and Stripping, Skirting boards & Architraves, Exterior wall painti...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Harborne it ranges from £1,800 (D Broomhall based in B45) to £2,176 (Home Renovation Solutions based in B69).
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 Harborne by posting a job with HaMuch and we will send it to extension builders in Harborne.
"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 Oldbury | £29 | £226 |
| Install An RSJ near Smethwick | £28 | £225 |
| Install An RSJ near Halesowen | £28 | £225 |
| Install An RSJ near Birmingham | £28 | £226 |
| Install An RSJ near Rowley Regis | £29 | £225 |
| Install An RSJ near West Bromwich | £28 | £225 |
| Install An RSJ near Sandwell | £29 | £228 |
| Install An RSJ near Dudley | £28 | £225 |
| Install An RSJ near Tipton | £29 | £226 |
| Install An RSJ near Brierley Hill | £28 | £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 - £17,304

Two storey extension - £87,706

Build a timber frame extension - £25,804

Build a swimming pool - £80,804

Single storey extension - £51,080

Side return extension - £39,295

Install an RSJ - £2,004

Outbuilding - £9,804

Build a Mansard loft conversion - £51,804

Loft conversion - £31,913

Build a kitchen extension - £41,804

Hip to gable loft conversion - £41,804

Granny annexe - £86,804

Garden office - £9,804

Convert a Garage - £15,804

Garage - £18,304

Build a flat roof extension - £21,804

Build a dormer loft conversion - £41,804

Concrete foundations - £6,054

Convert a bungalow loft - £28,804

Convert a basement - £35,295