From £2,664
With over 35 years experience our reputation is built around the service we provide which is why we have a high percentage of repeat business and t...
From £2,176
Need to find an Extension Builder near you for all your extension buildering work?
GEEVES BUILD LTD provides a local, trusted extension bui...
From £2,720
Hi my names Lewis in a trusted roofer, I’m a member of which trusted trader and Checkatrade member. I do all types of roof flat roofs, guttering,...
From £2,656
Infinity’s founder has international property development expertise, having undertaken traditional and contemporary projects spanning the UK, Ire...
From £2,184
Experienced extension builder ready to quote for your work. Capital Building & Maintenance is the best extension builder in CM6. No obligation free...
From £2,656
MDH Construction is an established and experienced local extension builder in CM6. Please contact us for a free, no obligation quote and competitiv...
From £2,408
Trusted and professional extension builder in CM6. Experienced in all extension buildering work and keeping within budget and on quote. 1st Look Ro...
From £2,120
Relax... you have found a reliable extension builder in CM6. C P R CONSTRUCTION LTD is a friendly and reliable company based in CM6 who consider no...
From £2,112
Right Renovations Limited are here to help customers who need an Extension Builder in CM6. We offer a competitive rate to complete all your extensi...
From £1,960
Trusted and professional extension builder in CM6. Experienced in all extension buildering work and keeping within budget and on quote. A T HOOKWAY...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CM6 it ranges from £1,960 (A T HOOKWAY (BUILDERS) based in CM3) to £2,720 (1st Look Roofing based in CM6).
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 CM6 by posting a job with HaMuch and we will send it to extension builders in CM6.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Bishop's Stortford | £42 | £264 |
| Install An RSJ near Braintree | £37 | £247 |
| Install An RSJ near Chelmsford | £38 | £258 |
| Install An RSJ near Harlow | £43 | £288 |
| Install An RSJ near Witham | £36 | £240 |
| Install An RSJ near Haverhill | £37 | £260 |
| Install An RSJ near Ware | £47 | £296 |
| Install An RSJ near Maldon | £36 | £244 |
| Install An RSJ near East Hertfordshire | £44 | £289 |
| Install An RSJ near Hoddesdon | £46 | £296 |
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 - £17,666

Two storey extension - £88,248

Build a timber frame extension - £26,166

Build a swimming pool - £81,166

Single storey extension - £58,312

Side return extension - £43,363

Install an RSJ - £2,366

Outbuilding - £10,166

Build a Mansard loft conversion - £52,166

Loft conversion - £35,303

Build a kitchen extension - £42,166

Hip to gable loft conversion - £42,166

Granny annexe - £87,166

Garden office - £10,166

Convert a Garage - £16,166

Garage - £18,666

Build a flat roof extension - £22,166

Build a dormer loft conversion - £42,166

Concrete foundations - £6,416

Convert a bungalow loft - £29,166

Convert a basement - £39,363