Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
A.J Builders is an established and experienced local extension builder in LU6. Please contact us for a free, no obligation quote and competitive ra...
Klajdi Progja
Need to find an Extension Builder near you for all your extension buildering work?
Mat al construction ltd provides a local, trusted exten...
Trusted and professional extension builder in LU6. Experienced in all extension buildering work and keeping within budget and on quote. Flitton Bro...
S Sherazi Home Improvement Service are here to help customers who need an Extension Builder in LU6. We offer a competitive rate to complete all you...
From £2,472
CURRYHILLS CONSTRUCTION LTD are here to help customers who need an Extension Builder in LU6. We offer a competitive rate to complete all your exten...
From £2,312
Relax... you have found a reliable extension builder in LU6. Brim Builds is a friendly and reliable company based in LU6 who consider no job as too...
From £2,464
JK Property Service is an established extension buildering business in LU6. We come highly recommended and provide competitive quotes for your work...
From £2,288
T Cobb Plastering is an established and experienced local extension builder in LU6. Please contact us for a free, no obligation quote and competiti...
From £2,568
A one-stop-shop for its customers setting new standards for affordable comfort and innovation. Our mission is to deliver high standard service at a...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in LU6 it ranges from £2,128 (Flitton Bros Property Ltd based in LU6) to £2,696 (Mat al construction ltd based in LU5).
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 LU6 by posting a job with HaMuch and we will send it to extension builders in LU6.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Dunstable | £41 | £274 |
| Install An RSJ near Luton | £42 | £279 |
| Install An RSJ near Leighton Buzzard | £38 | £270 |
| Install An RSJ near Berkhamsted | £41 | £263 |
| Install An RSJ near Hemel Hempstead | £42 | £270 |
| Install An RSJ near Harpenden | £87 | £317 |
| Install An RSJ near Mid Bedfordshire | £42 | £276 |
| Install An RSJ near Dacorum | £42 | £269 |
| Install An RSJ near Ampthill | £38 | £258 |
| Install An RSJ near Bletchley | £39 | £265 |
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 - £17,730

Two storey extension - £88,346

Build a timber frame extension - £26,230

Build a swimming pool - £81,230

Single storey extension - £59,608

Side return extension - £44,092

Install an RSJ - £2,430

Outbuilding - £10,230

Build a Mansard loft conversion - £52,230

Loft conversion - £35,910

Build a kitchen extension - £42,230

Hip to gable loft conversion - £42,230

Granny annexe - £87,230

Garden office - £10,230

Convert a Garage - £16,230

Garage - £18,730

Build a flat roof extension - £22,230

Build a dormer loft conversion - £42,230

Concrete foundations - £6,480

Convert a bungalow loft - £29,230

Convert a basement - £40,092