From £2,160
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,408
Maha Khaliq Design is an established and experienced local extension builder in HP27. Please contact us for a free, no obligation quote and competi...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in HP27 it ranges from £2,160 (Bellwood Homes based in HP27) to £2,408 (Maha Khaliq Design based in HP27).
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 HP27 by posting a job with HaMuch and we will send it to extension builders in HP27.
"RSJ installation" - GREAT MISSENDEN, job posted 09/06/24
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Wycombe | £40 | £271 |
| Install An RSJ near Hazlemere | £40 | £272 |
| Install An RSJ near High Wycombe | £39 | £272 |
| Install An RSJ near Aylesbury | £42 | £270 |
| Install An RSJ near Chesham | £42 | £277 |
| Install An RSJ near Berkhamsted | £41 | £263 |
| Install An RSJ near Aylesbury Vale | £36 | £246 |
| Install An RSJ near South Oxfordshire | £36 | £253 |
| Install An RSJ near Dacorum | £42 | £269 |
| Install An RSJ near Maidenhead | £41 | £273 |
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 - £17,584

Two storey extension - £88,126

Build a timber frame extension - £26,084

Build a swimming pool - £81,084

Single storey extension - £56,680

Side return extension - £42,445

Install an RSJ - £2,284

Outbuilding - £10,084

Build a Mansard loft conversion - £52,084

Loft conversion - £34,538

Build a kitchen extension - £42,084

Hip to gable loft conversion - £42,084

Granny annexe - £87,084

Garden office - £10,084

Convert a Garage - £16,084

Garage - £18,584

Build a flat roof extension - £22,084

Build a dormer loft conversion - £42,084

Concrete foundations - £6,334

Convert a bungalow loft - £29,084

Convert a basement - £38,445