Our building services company Dallcompanies Limited was established in May 2023, but have been helping customers in Milton Keynes and the surroundi...
Need an Extension Builder in MK8? Highland Homes & Gardens has been helping local clients (20 mile radius) with their extension buildering jobs for...
Trusted and professional extension builder in MK8. Experienced in all extension buildering work and keeping within budget and on quote. Langton Bui...
Relax... you have found a reliable extension builder in MK8. Dean Prichard Building Services is a friendly and reliable company based in MK8 who co...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need to find an Extension Builder near you for all your extension buildering work?
Asanta Builder provides a local, trusted extension build...
Need to find an Extension Builder near you for all your extension buildering work?
Go-Large Design & Build Ltd provides a local, trusted ex...
Need an Extension Builder in MK8? D Catt Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many yea...
John Addis
Our building services company JAB Home Improvements helps customers in Milton Keynes and the surrounding area by providing professional, trustworth...
From £2,616
BURCROFT BUILDERS is an established and experienced local extension builder in MK8. Please contact us for a free, no obligation quote and competiti...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in MK8 it ranges from £2,048 (Highland Homes & Gardens based in MK4) 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 MK8 by posting a job with HaMuch and we will send it to extension builders in MK8.
"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 Leighton Buzzard | £38 | £270 |
| Install An RSJ near Aylesbury Vale | £36 | £246 |
| Install An RSJ near Ampthill | £38 | £258 |
| Install An RSJ near Mid Bedfordshire | £42 | £276 |
| Install An RSJ near Northampton | £35 | £239 |
| Install An RSJ near Aylesbury | £42 | £270 |
| Install An RSJ near Kempston | £44 | £273 |
| Install An RSJ near Dunstable | £41 | £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 - £17,650

Two storey extension - £88,226

Build a timber frame extension - £26,150

Build a swimming pool - £81,150

Single storey extension - £58,008

Side return extension - £43,192

Install an RSJ - £2,350

Outbuilding - £10,150

Build a Mansard loft conversion - £52,150

Loft conversion - £35,160

Build a kitchen extension - £42,150

Hip to gable loft conversion - £42,150

Granny annexe - £87,150

Garden office - £10,150

Convert a Garage - £16,150

Garage - £18,650

Build a flat roof extension - £22,150

Build a dormer loft conversion - £42,150

Concrete foundations - £6,400

Convert a bungalow loft - £29,150

Convert a basement - £39,192