From £2,136
Quirk Design and Build are a family run business based in Braintree, Essex with more than 25 years experience in residential building projects.From...
From £2,168
Experienced extension builder ready to quote for your work. RPR Build Works is the best extension builder in CM77. No obligation free quotes and ma...
From £2,384
We provide our Customers in the Essex and London area with a wide range of property related services, including kitchen, bathroom, bedroom and comp...
From £2,024
DCM Construction is an established and experienced local extension builder in CM77. Please contact us for a free, no obligation quote and competiti...
From £2,120
Relax... you have found a reliable extension builder in CM77. C P R CONSTRUCTION LTD is a friendly and reliable company based in CM77 who consider ...
From £2,240
Bigland Builders is an established extension buildering business in CM77. We come highly recommended and provide competitive quotes for your work.<...
From £1,984
Trusted and professional extension builder in CM77. Experienced in all extension buildering work and keeping within budget and on quote. SYSTEM MET...
From £1,960
Trusted and professional extension builder in CM77. Experienced in all extension buildering work and keeping within budget and on quote. A T HOOKWA...
From £2,472
Our building services company Expertise Property Services Ltd was established over 20 years ago. Since then we have been helping customers in Essex...
From £2,184
Experienced extension builder ready to quote for your work. Capital Building & Maintenance is the best extension builder in CM77. No obligation fre...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CM77 it ranges from £1,960 (A T HOOKWAY (BUILDERS) based in CM3) to £2,472 (Expertise Property Services Ltd based in CM8).
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 CM77 by posting a job with HaMuch and we will send it to extension builders in CM77.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Braintree | £37 | £247 |
| Install An RSJ near Witham | £36 | £240 |
| Install An RSJ near Chelmsford | £38 | £258 |
| Install An RSJ near Maldon | £36 | £244 |
| Install An RSJ near Bishop's Stortford | £42 | £264 |
| Install An RSJ near Haverhill | £37 | £260 |
| Install An RSJ near Colchester | £33 | £230 |
| Install An RSJ near Sudbury | £34 | £229 |
| Install An RSJ near Billericay | £38 | £248 |
| Install An RSJ near Wickford | £39 | £255 |
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 - £17,467

Two storey extension - £87,951

Build a timber frame extension - £25,967

Build a swimming pool - £80,967

Single storey extension - £54,344

Side return extension - £41,131

Install an RSJ - £2,167

Outbuilding - £9,967

Build a Mansard loft conversion - £51,967

Loft conversion - £33,443

Build a kitchen extension - £41,967

Hip to gable loft conversion - £41,967

Granny annexe - £86,967

Garden office - £9,967

Convert a Garage - £15,967

Garage - £18,467

Build a flat roof extension - £21,967

Build a dormer loft conversion - £41,967

Concrete foundations - £6,217

Convert a bungalow loft - £28,967

Convert a basement - £37,131