From £2,416
Need an Extension Builder in CO9? DELTA BUILD LIMITED has been helping local clients (20 mile radius) with their extension buildering jobs for many...
From £2,080
Need an Extension Builder in CO9? Mc2 Building Services has been helping local clients (20 mile radius) with their extension buildering jobs for ma...
From £2,248
Ashdell is an established and experienced local extension builder in CO9. Please contact us for a free, no obligation quote and competitive rates. ...
From £2,200
Relax... you have found a reliable extension builder in CO9. Premier Building is a friendly and reliable company based in CO9 who consider no job a...
From £2,040
Need to find an Extension Builder near you for all your extension buildering work?
D Mason Developments Ltd provides a local, trusted exten...
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 £2,168
Experienced extension builder ready to quote for your work. RPR Build Works is the best extension builder in CO9. No obligation free quotes and man...
From £2,008
Trusted and professional extension builder in CO9. Experienced in all extension buildering work and keeping within budget and on quote. We Love Pro...
From £2,168
Our building works company have 33 years of experience providing a professional, high quality, knowledgeable & trustworthy buildings update, renova...
From £1,984
Trusted and professional extension builder in CO9. Experienced in all extension buildering work and keeping within budget and on quote. SYSTEM METH...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CO9 it ranges from £1,984 (SYSTEM METHOD BUILDING LTD based in CM8) to £2,416 (DELTA BUILD LIMITED based in CO9).
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 CO9 by posting a job with HaMuch and we will send it to extension builders in CO9.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Braintree | £32 | £218 |
| Install An RSJ near Sudbury | £30 | £208 |
| Install An RSJ near Haverhill | £32 | £228 |
| Install An RSJ near Witham | £31 | £208 |
| Install An RSJ near Colchester | £29 | £200 |
| Install An RSJ near Maldon | £32 | £213 |
| Install An RSJ near Chelmsford | £33 | £224 |
| Install An RSJ near Bishop's Stortford | £36 | £229 |
| Install An RSJ near Bury St Edmunds | £29 | £215 |
| Install An RSJ near Tendring | £27 | £195 |
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 - £17,470

Two storey extension - £87,954

Build a timber frame extension - £25,970

Build a swimming pool - £80,970

Single storey extension - £54,392

Side return extension - £41,158

Install an RSJ - £2,170

Outbuilding - £9,970

Build a Mansard loft conversion - £51,970

Loft conversion - £33,465

Build a kitchen extension - £41,970

Hip to gable loft conversion - £41,970

Granny annexe - £86,970

Garden office - £9,970

Convert a Garage - £15,970

Garage - £18,470

Build a flat roof extension - £21,970

Build a dormer loft conversion - £41,970

Concrete foundations - £6,220

Convert a bungalow loft - £28,970

Convert a basement - £37,158