From £2,168
Experienced extension builder ready to quote for your work. RPR Build Works is the best extension builder in CM7. No obligation free quotes and man...
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 £2,136
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 £2,120
Relax... you have found a reliable extension builder in CM7. C P R CONSTRUCTION LTD is a friendly and reliable company based in CM7 who consider no...
From £1,984
Trusted and professional extension builder in CM7. Experienced in all extension buildering work and keeping within budget and on quote. SYSTEM METH...
From £2,248
Ashdell is an established and experienced local extension builder in CM7. Please contact us for a free, no obligation quote and competitive rates. ...
From £2,024
DCM Construction is an established and experienced local extension builder in CM7. Please contact us for a free, no obligation quote and competitiv...
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 £1,960
Trusted and professional extension builder in CM7. Experienced in all extension buildering work and keeping within budget and on quote. A T HOOKWAY...
From £2,240
Bigland Builders is an established extension buildering business in CM7. We come highly recommended and provide competitive quotes for your work.

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CM7 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 CM7 by posting a job with HaMuch and we will send it to extension builders in CM7.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Braintree | £32 | £218 |
| Install An RSJ near Witham | £31 | £208 |
| Install An RSJ near Chelmsford | £33 | £224 |
| Install An RSJ near Maldon | £32 | £213 |
| Install An RSJ near Haverhill | £32 | £228 |
| Install An RSJ near Sudbury | £30 | £208 |
| Install An RSJ near Bishop's Stortford | £36 | £229 |
| Install An RSJ near Colchester | £29 | £200 |
| Install An RSJ near Harlow | £37 | £247 |
| Install An RSJ near Billericay | £34 | £219 |
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 - £17,474

Two storey extension - £87,960

Build a timber frame extension - £25,974

Build a swimming pool - £80,974

Single storey extension - £54,472

Side return extension - £41,203

Install an RSJ - £2,174

Outbuilding - £9,974

Build a Mansard loft conversion - £51,974

Loft conversion - £33,503

Build a kitchen extension - £41,974

Hip to gable loft conversion - £41,974

Granny annexe - £86,974

Garden office - £9,974

Convert a Garage - £15,974

Garage - £18,474

Build a flat roof extension - £21,974

Build a dormer loft conversion - £41,974

Concrete foundations - £6,224

Convert a bungalow loft - £28,974

Convert a basement - £37,203