From £2,328
Trusted and professional extension builder in HP15. Experienced in all extension buildering work and keeping within budget and on quote. Steve Knig...
From £2,568
Steve Knight Construction is a High Wycombe based Building Company with 38 years experience in all aspects of the Construction Industry. We are abl...
From £2,592
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,272
As a full-service provider, we are dedicated to delivering an outstanding fit out experience for all of our customers. With our innovative designs,...
From £3,648
Need an Extension Builder in HP15? Bantry Construction Limited has been helping local clients (20 mile radius) with their extension buildering jobs...
From £2,472
Trusted and professional extension builder in HP15. Experienced in all extension buildering work and keeping within budget and on quote. G T Builde...
From £2,480
Our building services company Charts Project Management and Build has been helping customers in Buckinghamshire and the surrounding area by providi...
From £2,600
E E Construction is an established extension buildering business in HP15. We come highly recommended and provide competitive quotes for your work.<...
From £2,552
CONCEPT BUILD are here to help customers who need an Extension Builder in HP15. We offer a competitive rate to complete all your extension builderi...
From £2,240
Mitchell & Co Building & Renovations Ltd is an established extension buildering business in HP15. We come highly recommended and provide competitiv...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in HP15 it ranges from £2,240 (Mitchell & Co Building & Renovations Ltd based in HP13) to £3,648 (Bantry Construction Limited based in HP10).
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 HP15 by posting a job with HaMuch and we will send it to extension builders in HP15.
"RSJ installation" - GREAT MISSENDEN
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Hazlemere | £40 | £272 |
| Install An RSJ near High Wycombe | £39 | £272 |
| Install An RSJ near Wycombe | £39 | £271 |
| Install An RSJ near Chesham | £42 | £277 |
| Install An RSJ near Gerrards Cross | £43 | £282 |
| Install An RSJ near Maidenhead | £41 | £273 |
| Install An RSJ near Berkhamsted | £41 | £263 |
| Install An RSJ near Rickmansworth | £42 | £278 |
| Install An RSJ near Dacorum | £42 | £269 |
| Install An RSJ near Slough | £42 | £272 |
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 - £17,875

Two storey extension - £88,563

Build a timber frame extension - £26,375

Build a swimming pool - £81,375

Single storey extension - £62,504

Side return extension - £45,721

Install an RSJ - £2,575

Outbuilding - £10,375

Build a Mansard loft conversion - £52,375

Loft conversion - £37,268

Build a kitchen extension - £42,375

Hip to gable loft conversion - £42,375

Granny annexe - £87,375

Garden office - £10,375

Convert a Garage - £16,375

Garage - £18,875

Build a flat roof extension - £22,375

Build a dormer loft conversion - £42,375

Concrete foundations - £6,625

Convert a bungalow loft - £29,375

Convert a basement - £41,721