From £2,408
A Stanley Building Services is an established and experienced local extension builder in RG20. Please contact us for a free, no obligation quote an...
From £2,240
Need an Extension Builder in RG20? Helyar Project Services Ltd has been helping local clients (20 mile radius) with their extension buildering jobs...
From £2,496
Fabric First Build Projects Ltd are here to help customers who need an Extension Builder in RG20. We offer a competitive rate to complete all your ...
From £2,352
Need to find an Extension Builder near you for all your extension buildering work?
Complete Building Services provides a local, trusted ext...
From £2,232
Hartwood Oak Buildings Ltd. are here to help customers who need an Extension Builder in RG20. We offer a competitive rate to complete all your exte...
From £2,368
Relax... you have found a reliable extension builder in RG20. Total Home Improvements is a friendly and reliable company based in RG20 who consider...
From £2,296
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,376
Need to find an Extension Builder near you for all your extension buildering work?
A4 BUILDING & RENOVATION LTD provides a local, trusted e...
From £2,560
Our building services company ROK Construction who are family-run have thirty-years experience. We have been helping customers in Baughurst and the...
From £2,544
Trusted and professional extension builder in RG20. Experienced in all extension buildering work and keeping within budget and on quote. Bradfield ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in RG20 it ranges from £2,232 (Hartwood Oak Buildings Ltd. based in RG20) to £2,560 (ROK Construction based in RG26).
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 RG20 by posting a job with HaMuch and we will send it to extension builders in RG20.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Newbury | £37 | £262 |
| Install An RSJ near Thatcham | £38 | £266 |
| Install An RSJ near Basingstoke & Deane | £39 | £273 |
| Install An RSJ near Didcot | £36 | £266 |
| Install An RSJ near Basingstoke | £39 | £274 |
| Install An RSJ near Andover | £40 | £248 |
| Install An RSJ near Reading | £42 | £266 |
| Install An RSJ near Caversham | £38 | £265 |
| Install An RSJ near Vale of White Horse | £36 | £271 |
| Install An RSJ near Abingdon-on-Thames | £35 | £258 |
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 - £17,687

Two storey extension - £88,281

Build a timber frame extension - £26,187

Build a swimming pool - £81,187

Single storey extension - £58,744

Side return extension - £43,606

Install an RSJ - £2,387

Outbuilding - £10,187

Build a Mansard loft conversion - £52,187

Loft conversion - £35,505

Build a kitchen extension - £42,187

Hip to gable loft conversion - £42,187

Granny annexe - £87,187

Garden office - £10,187

Convert a Garage - £16,187

Garage - £18,687

Build a flat roof extension - £22,187

Build a dormer loft conversion - £42,187

Concrete foundations - £6,437

Convert a bungalow loft - £29,187

Convert a basement - £39,606