From £2,440
I am a British Gas trained engineer with a vast knowledge of all gas, central heating, and plumbing systems. Now working independently, I provide i...
From £2,424
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,472
Need to find an Extension Builder near you for all your extension buildering work?
Asanta Builder provides a local, trusted extension build...
From £2,288
Need to find an Extension Builder near you for all your extension buildering work?
Go-Large Design & Build Ltd provides a local, trusted ex...
From £1,944
Need an Extension Builder in MK10? J&J Property Services has been helping local clients (20 mile radius) with their extension buildering jobs for m...
From £2,240
Trusted and professional extension builder in MK10. Experienced in all extension buildering work and keeping within budget and on quote. Langton Bu...
From £2,432
Our building services company Steve Miller Building Services have thirty-eight years’ experience and have been helping customers in Pagnell and t...
From £2,640
EXPERT BUILDING SERVICES is an established and experienced local extension builder in MK10. Please contact us for a free, no obligation quote and c...
From £2,352
Our building services company Dallcompanies Limited was established in May 2023, but have been helping customers in Milton Keynes and the surroundi...
From £2,616
BURCROFT BUILDERS is an established and experienced local extension builder in MK10. Please contact us for a free, no obligation quote and competit...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in MK10 it ranges from £1,944 (J&J Property Services based in MK14) to £2,640 (EXPERT BUILDING SERVICES based in MK17).
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 MK10 by posting a job with HaMuch and we will send it to extension builders in MK10.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Milton Keynes | £33 | £226 |
| Install An RSJ near Bletchley | £34 | £227 |
| Install An RSJ near Ampthill | £31 | £214 |
| Install An RSJ near Leighton Buzzard | £33 | £235 |
| Install An RSJ near Mid Bedfordshire | £34 | £225 |
| Install An RSJ near Kempston | £37 | £230 |
| Install An RSJ near Bedford | £38 | £233 |
| Install An RSJ near South Bedfordshire | £38 | £233 |
| Install An RSJ near Dunstable | £36 | £235 |
| Install An RSJ near Aylesbury Vale | £34 | £230 |
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 - £17,685

Two storey extension - £88,277

Build a timber frame extension - £26,185

Build a swimming pool - £81,185

Single storey extension - £58,696

Side return extension - £43,579

Install an RSJ - £2,385

Outbuilding - £10,185

Build a Mansard loft conversion - £52,185

Loft conversion - £35,483

Build a kitchen extension - £42,185

Hip to gable loft conversion - £42,185

Granny annexe - £87,185

Garden office - £10,185

Convert a Garage - £16,185

Garage - £18,685

Build a flat roof extension - £22,185

Build a dormer loft conversion - £42,185

Concrete foundations - £6,435

Convert a bungalow loft - £29,185

Convert a basement - £39,579