Platinum Build Ltd are here to help customers who need an Extension Builder in Ashendon. We offer a competitive rate to complete all your extension...
We are ADC Landscaping & Gardening, owned and run by Ashley Collier. We are a family business based in Aylesbury, Buckinghamshire, and cover all as...
Trusted and professional extension builder in Ashendon. Experienced in all extension buildering work and keeping within budget and on quote. C HORW...
D M B E BUILDPLUS is an established and experienced local extension builder in Ashendon. Please contact us for a free, no obligation quote and comp...
Just Lofts are here to help customers who need an Extension Builder in Ashendon. We offer a competitive rate to complete all your extension builder...
AMG Roofing (Bucks) Ltd is owned by Ashley Gibson, a small, friendly, family run business that began in 2020, as a result of the Pandemic and an ac...
From £2,168
Experienced extension builder ready to quote for your work. VICTOR KING CONSTRUCTION is the best extension builder in Ashendon. No obligation free ...
From £2,328
Relax... you have found a reliable extension builder in Ashendon. Trew Builders is a friendly and reliable company based in Ashendon who consider n...
From £2,480
Trusted and professional extension builder in Ashendon. Experienced in all extension buildering work and keeping within budget and on quote. BUILDR...
From £2,320
Specialising in all finishing trades from start to finish all in house

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Ashendon it ranges from £2,168 (VICTOR KING CONSTRUCTION based in HP21) to £2,648 (C HORWOOD CONSTRUCTION based in HP19).
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 Ashendon by posting a job with HaMuch and we will send it to extension builders in Ashendon.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Aylesbury Vale | £36 | £246 |
| Install An RSJ near Aylesbury | £42 | £270 |
| Install An RSJ near Bicester | £35 | £249 |
| Install An RSJ near Cherwell | £35 | £249 |
| Install An RSJ near Oxford | £37 | £261 |
| Install An RSJ near South Oxfordshire | £36 | £253 |
| Install An RSJ near Wycombe | £39 | £271 |
| Install An RSJ near Leighton Buzzard | £38 | £270 |
| Install An RSJ near High Wycombe | £39 | £272 |
| Install An RSJ near Hazlemere | £40 | £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 - £17,703

Two storey extension - £88,305

Build a timber frame extension - £26,203

Build a swimming pool - £81,203

Single storey extension - £59,064

Side return extension - £43,786

Install an RSJ - £2,403

Outbuilding - £10,203

Build a Mansard loft conversion - £52,203

Loft conversion - £35,655

Build a kitchen extension - £42,203

Hip to gable loft conversion - £42,203

Granny annexe - £87,203

Garden office - £10,203

Convert a Garage - £16,203

Garage - £18,703

Build a flat roof extension - £22,203

Build a dormer loft conversion - £42,203

Concrete foundations - £6,453

Convert a bungalow loft - £29,203

Convert a basement - £39,786