From £2,288
Need to find an Extension Builder near you for all your extension buildering work?
PSB Builders Ltd provides a local, trusted extension bui...
From £2,240
Mitchell & Co Building & Renovations Ltd is an established extension buildering business in HP13. We come highly recommended and provide competitiv...
From £2,296
Relax... you have found a reliable extension builder in HP13. Building High Wycombe is a friendly and reliable company based in HP13 who consider n...
From £2,472
Trusted and professional extension builder in HP13. Experienced in all extension buildering work and keeping within budget and on quote. G T Builde...
From £2,624
Here at S Halls Construction Ltd, we undertake all hard landscaping works. Patios, driveways, fencing and groundworks, we also cover many areas of ...
From £2,600
Lazor Construction Ltd are here to help customers who need an Extension Builder in HP13. We offer a competitive rate to complete all your extension...
From £2,288
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,504
Relax... you have found a reliable extension builder in HP13. JAMES BUILDERS is a friendly and reliable company based in HP13 who consider no job a...
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 £2,480
Our building services company Charts Project Management and Build has been helping customers in Buckinghamshire and the surrounding area by providi...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in HP13 it ranges from £2,240 (Mitchell & Co Building & Renovations Ltd based in HP13) to £2,624 (S Halls Construction Ltd based in HP13).
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 HP13 by posting a job with HaMuch and we will send it to extension builders in HP13.
"RSJ installation" - GREAT MISSENDEN
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near High Wycombe | £39 | £272 |
| Install An RSJ near Hazlemere | £40 | £272 |
| Install An RSJ near Wycombe | £39 | £271 |
| Install An RSJ near Maidenhead | £41 | £273 |
| Install An RSJ near Chesham | £42 | £277 |
| Install An RSJ near Gerrards Cross | £43 | £282 |
| Install An RSJ near Slough | £42 | £274 |
| Install An RSJ near Rickmansworth | £42 | £278 |
| Install An RSJ near Windsor & Maidenhead | £42 | £274 |
| Install An RSJ near Berkhamsted | £41 | £263 |
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 - £17,706

Two storey extension - £88,310

Build a timber frame extension - £26,206

Build a swimming pool - £81,206

Single storey extension - £59,128

Side return extension - £43,822

Install an RSJ - £2,406

Outbuilding - £10,206

Build a Mansard loft conversion - £52,206

Loft conversion - £35,685

Build a kitchen extension - £42,206

Hip to gable loft conversion - £42,206

Granny annexe - £87,206

Garden office - £10,206

Convert a Garage - £16,206

Garage - £18,706

Build a flat roof extension - £22,206

Build a dormer loft conversion - £42,206

Concrete foundations - £6,456

Convert a bungalow loft - £29,206

Convert a basement - £39,822