From £2,296
Relax... you have found a reliable extension builder in Wycombe Marsh. Building High Wycombe is a friendly and reliable company based in Wycombe Ma...
From £2,600
Lazor Construction Ltd are here to help customers who need an Extension Builder in Wycombe Marsh. We offer a competitive rate to complete all your ...
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 £2,288
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,240
Mitchell & Co Building & Renovations Ltd is an established extension buildering business in Wycombe Marsh. We come highly recommended and provide c...
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 £2,104
Bow Tie Construction is an established and experienced local extension builder in Wycombe Marsh. Please contact us for a free, no obligation quote ...
From £2,472
Trusted and professional extension builder in Wycombe Marsh. Experienced in all extension buildering work and keeping within budget and on quote. G...
From £2,520
Trusted and professional extension builder in Wycombe Marsh. Experienced in all extension buildering work and keeping within budget and on quote. S...
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 Wycombe Marsh it ranges from £2,104 (Bow Tie Construction based in HP12) 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 Wycombe Marsh by posting a job with HaMuch and we will send it to extension builders in Wycombe Marsh.
| 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 Gerrards Cross | £43 | £282 |
| Install An RSJ near Chesham | £42 | £277 |
| Install An RSJ near Slough | £42 | £272 |
| Install An RSJ near Windsor & Maidenhead | £42 | £272 |
| Install An RSJ near Rickmansworth | £42 | £278 |
| Install An RSJ near Windsor | £41 | £271 |
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 - £17,691

Two storey extension - £88,287

Build a timber frame extension - £26,191

Build a swimming pool - £81,191

Single storey extension - £58,824

Side return extension - £43,651

Install an RSJ - £2,391

Outbuilding - £10,191

Build a Mansard loft conversion - £52,191

Loft conversion - £35,543

Build a kitchen extension - £42,191

Hip to gable loft conversion - £42,191

Granny annexe - £87,191

Garden office - £10,191

Convert a Garage - £16,191

Garage - £18,691

Build a flat roof extension - £22,191

Build a dormer loft conversion - £42,191

Concrete foundations - £6,441

Convert a bungalow loft - £29,191

Convert a basement - £39,651