Relax... you have found a reliable extension builder in SL7. ABC Associates STRUCTURES 4 U is a friendly and reliable company based in SL7 who cons...
GREENWORKS CONSTRUCTION is an established and experienced local extension builder in SL7. Please contact us for a free, no obligation quote and com...
Trusted and professional extension builder in SL7. Experienced in all extension buildering work and keeping within budget and on quote. Shaks build...
From £2,480
Stonehouse Consultants is an independent specialist construction consultancy delivering a range of quality construction services to projects throug...
From £2,176
Georgie Noone has worked in the property industry for the last 15 years, undertaking house refurbishments, extensions and new builds. She has worke...
From £2,320
Relax... you have found a reliable extension builder in SL7. SPACE Design. Build. Interiors is a friendly and reliable company based in SL7 who con...
From £2,504
James Dawson
Our maidenhead based Carpentry, Joinery & Building company can offer a complete single room or property solution to you. Working with han...
From £2,384
Experienced extension builder ready to quote for your work. Good Country Builders is the best extension builder in SL7. No obligation free quotes a...
From £2,280
Need to find an Extension Builder near you for all your extension buildering work?
Complete Home Development provides a local, trusted exte...
From £2,104
Experienced extension builder ready to quote for your work. Wooburn Project Management Ltd is the best extension builder in SL7. No obligation free...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SL7 it ranges from £2,104 (Wooburn Project Management Ltd based in HP12) to £2,520 (Shaks build based in Hp12).
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 SL7 by posting a job with HaMuch and we will send it to extension builders in SL7.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near High Wycombe | £39 | £272 |
| Install An RSJ near Maidenhead | £41 | £273 |
| Install An RSJ near Wycombe | £39 | £271 |
| Install An RSJ near Hazlemere | £40 | £272 |
| Install An RSJ near Slough | £42 | £272 |
| Install An RSJ near Windsor | £41 | £271 |
| Install An RSJ near Windsor & Maidenhead | £42 | £272 |
| Install An RSJ near Gerrards Cross | £43 | £282 |
| Install An RSJ near Woodley | £42 | £266 |
| Install An RSJ near Caversham | £38 | £265 |
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 - £17,648

Two storey extension - £88,222

Build a timber frame extension - £26,148

Build a swimming pool - £81,148

Single storey extension - £57,960

Side return extension - £43,165

Install an RSJ - £2,348

Outbuilding - £10,148

Build a Mansard loft conversion - £52,148

Loft conversion - £35,138

Build a kitchen extension - £42,148

Hip to gable loft conversion - £42,148

Granny annexe - £87,148

Garden office - £10,148

Convert a Garage - £16,148

Garage - £18,648

Build a flat roof extension - £22,148

Build a dormer loft conversion - £42,148

Concrete foundations - £6,398

Convert a bungalow loft - £29,148

Convert a basement - £39,165