From £2,264
I have been in the building industry for 28 years and have carried out extensions,loft conversions, knock throughs, plastering, carpentry,roofing a...
From £2,128
JEWEL BUILDERS LTD are here to help customers who need an Extension Builder in Warwickshire. We offer a competitive rate to complete all your exten...
From £2,240
Experienced extension builder ready to quote for your work. Redbrickz Property Management Ltd is the best extension builder in Warwickshire. No obl...
From £1,976
Benton Builders is an established and experienced local extension builder in Warwickshire. Please contact us for a free, no obligation quote and co...
From £1,984
Form Construction Midlands Limited is a trusted extension builder serving customers in Warwickshire and the surrounding area. Contact us to today t...
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 £1,760
Need to find an Extension Builder near you for all your extension buildering work?
Cubit Contracts provides a local, trusted extension buil...
From £2,208
Experienced extension builder ready to quote for your work. J.G Builders is the best extension builder in Warwickshire. No obligation free quotes a...
From £2,168
Warwickshire, B92
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 ...
From £1,928
Relax... you have found a reliable extension builder in Warwickshire. F.I.I Building Services Ltd is a friendly and reliable company based in Warwi...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Warwickshire it ranges from £1,760 (Cubit Contracts based in B98) to £2,264 (MYBUILD based in B93).
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 Warwickshire by posting a job with HaMuch and we will send it to extension builders in Warwickshire.
"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
"RSJ installation" - B90, job posted 03/08/26
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Knowle | £31 | £241 |
| Install An RSJ near Solihull | £29 | £231 |
| Install An RSJ near Redditch | £32 | £234 |
| Install An RSJ near Warwick | £28 | £213 |
| Install An RSJ near Birmingham | £29 | £227 |
| Install An RSJ near Kenilworth | £29 | £224 |
| Install An RSJ near Bromsgrove | £31 | £237 |
| Install An RSJ near Stratford-on-Avon | £27 | £215 |
| Install An RSJ near Stratford-upon-Avon | £27 | £215 |
| Install An RSJ near Coventry | £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 - £17,380

Two storey extension - £87,820

Build a timber frame extension - £25,880

Build a swimming pool - £80,880

Single storey extension - £52,600

Side return extension - £40,150

Install an RSJ - £2,080

Outbuilding - £9,880

Build a Mansard loft conversion - £51,880

Loft conversion - £32,625

Build a kitchen extension - £41,880

Hip to gable loft conversion - £41,880

Granny annexe - £86,880

Garden office - £9,880

Convert a Garage - £15,880

Garage - £18,380

Build a flat roof extension - £21,880

Build a dormer loft conversion - £41,880

Concrete foundations - £6,130

Convert a bungalow loft - £28,880

Convert a basement - £36,150