From £2,448
Hyatt and Co Building Services was established over 20 years ago and have been providing customers in Milton Keynes and the surrounding areas a pro...
From £2,432
Relax... you have found a reliable extension builder in MK11. Alexander Bradshaw LTD is a friendly and reliable company based in MK11 who consider ...
From £2,216
Need an Extension Builder in MK11? D Catt Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many ye...
From £2,152
Relax... you have found a reliable extension builder in MK11. Dean Prichard Building Services is a friendly and reliable company based in MK11 who ...
From £2,592
Need an Extension Builder in MK11? STARGRADE CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering jobs ...
From £2,480
Need an Extension Builder in MK11? JA Project Management Services has been helping local clients (20 mile radius) with their extension buildering j...
From £2,240
Trusted and professional extension builder in MK11. Experienced in all extension buildering work and keeping within budget and on quote. Langton Bu...
From £2,696
Our building services company JAB Home Improvements helps customers in Milton Keynes and the surrounding area by providing professional, trustworth...
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...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in MK11 it ranges from £2,056 (R&R CONSTRUCTION based in MK12) to £2,696 (JAB based in MK4).
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 MK11 by posting a job with HaMuch and we will send it to extension builders in MK11.
"Internal supporting wall needs removing (3.5m wide) and RSJ installed above plinths within ceiling." - MK19, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Milton Keynes | £39 | £263 |
| Install An RSJ near Bletchley | £39 | £265 |
| Install An RSJ near Aylesbury Vale | £36 | £246 |
| Install An RSJ near Leighton Buzzard | £38 | £270 |
| Install An RSJ near Northampton | £35 | £239 |
| Install An RSJ near Ampthill | £38 | £258 |
| Install An RSJ near Aylesbury | £42 | £270 |
| Install An RSJ near Kempston | £44 | £273 |
| Install An RSJ near Mid Bedfordshire | £42 | £276 |
| Install An RSJ near Bicester | £35 | £249 |
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 - £17,678

Two storey extension - £88,268

Build a timber frame extension - £26,178

Build a swimming pool - £81,178

Single storey extension - £58,568

Side return extension - £43,507

Install an RSJ - £2,378

Outbuilding - £10,178

Build a Mansard loft conversion - £52,178

Loft conversion - £35,423

Build a kitchen extension - £42,178

Hip to gable loft conversion - £42,178

Granny annexe - £87,178

Garden office - £10,178

Convert a Garage - £16,178

Garage - £18,678

Build a flat roof extension - £22,178

Build a dormer loft conversion - £42,178

Concrete foundations - £6,428

Convert a bungalow loft - £29,178

Convert a basement - £39,507