Need an Extension Builder in SG6? WILLMOTT DIXON CONSTRUCTION LI has been helping local clients (20 mile radius) with their extension buildering jo...
Experienced extension builder ready to quote for your work. HB Construction is the best extension builder in SG6. No obligation free quotes and man...
Need an Extension Builder in SG6? M SPINDLER CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering jobs ...
From £2,320
James Hogbourne
For more than 10 years, North Hertfordshire Construction LTD have been the name you can trust when it comes to building and development! We are kno...
From £2,608
M P BUILDING LIMITED is an established and experienced local extension builder in SG6. Please contact us for a free, no obligation quote and compet...
From £1,904
Need an Extension Builder in SG6? L P L Property Services Limited has been helping local clients (20 mile radius) with their extension buildering j...
From £2,520
Totalworth Building Services is an established extension buildering business in SG6. We come highly recommended and provide competitive quotes for ...
From £2,512
Experienced extension builder ready to quote for your work. Bricklayers is the best extension builder in SG6. No obligation free quotes and many ha...
From £2,368
Need an Extension Builder in SG6? Gilbert & Gregson Construction Ltd has been helping local clients (20 mile radius) with their extension builderin...
From £2,328
Draincall Services Ltd is a trusted extension builder serving customers in SG6 and the surrounding area. Contact us to today to get a competitive q...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SG6 it ranges from £1,904 (L P L Property Services Limited based in SG5) to £2,688 (M SPINDLER CONSTRUCTION LTD based in SG6).
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 SG6 by posting a job with HaMuch and we will send it to extension builders in SG6.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Letchworth | £44 | £283 |
| Install An RSJ near North Hertfordshire | £44 | £283 |
| Install An RSJ near Hitchin | £43 | £283 |
| Install An RSJ near Stevenage | £44 | £282 |
| Install An RSJ near Biggleswade | £41 | £268 |
| Install An RSJ near East Hertfordshire | £44 | £289 |
| Install An RSJ near Mid Bedfordshire | £42 | £276 |
| Install An RSJ near Luton | £41 | £278 |
| Install An RSJ near Ampthill | £38 | £258 |
| Install An RSJ near Harpenden | £86 | £316 |
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 - £17,724

Two storey extension - £88,336

Build a timber frame extension - £26,224

Build a swimming pool - £81,224

Single storey extension - £59,480

Side return extension - £44,020

Install an RSJ - £2,424

Outbuilding - £10,224

Build a Mansard loft conversion - £52,224

Loft conversion - £35,850

Build a kitchen extension - £42,224

Hip to gable loft conversion - £42,224

Granny annexe - £87,224

Garden office - £10,224

Convert a Garage - £16,224

Garage - £18,724

Build a flat roof extension - £22,224

Build a dormer loft conversion - £42,224

Concrete foundations - £6,474

Convert a bungalow loft - £29,224

Convert a basement - £40,020