Find a builder to make your building structurally sound

RSJs support your new extension or other construction to ensure that your property is structurally sound. They are crucial parts of your building work that mustn't be ignored, and must be installed by a professional. 

Install an RSJ cost in CO15 - Sort by rates or availability

From £3,168

(last active 22/09/26)
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Universal Property Services Ltd

Daniel Fermor

Universal Property Services Ltd is an established and experienced local extension builder in CO15. Please contact us for a free, no obligation quot...

From £1,880

(last active 12/09/26)
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CHAPEL BUILDING SERVICES LTD

Trusted and professional extension builder in CO15. Experienced in all extension buildering work and keeping within budget and on quote. CHAPEL BUI...

From £2,096

(last active 03/09/26)
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Mikra Services

Relax... you have found a reliable extension builder in CO15. Mikra Services is a friendly and reliable company based in CO15 who consider no job a...

From £1,920

(last active 02/09/26)
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S & A Building & Landscapes Service

Need an Extension Builder in CO15? S & A Building & Landscapes Service has been helping local clients (20 mile radius) with their extension builder...

From £2,016

(last active 02/09/26)
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M & C CONSTRUCTION

Malcolm Law

M & C CONSTRUCTION is an established extension buildering business in CO15. We come highly recommended and provide competitive quotes for your work...

From £2,208

(last active 02/09/26)
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AAV CONSTRUCTION LIMITED

AAV CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in CO15. We offer a competitive rate to complete all your extensi...

From £1,808

(last active 02/09/26)
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JDS Building Services

JDS Building Services is an established extension buildering business in CO15. We come highly recommended and provide competitive quotes for your w...

From £2,240

(last active 02/09/26)
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ALPHA BUILDING COMPANY LTD

ALPHA BUILDING COMPANY LTD are here to help customers who need an Extension Builder in CO15. We offer a competitive rate to complete all your exten...

From £2,104

(last active 02/09/26)
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SPONG BUILDERS & CONTRACTORS

SPONG BUILDERS & CONTRACTORS is a trusted extension builder serving customers in CO15 and the surrounding area. Contact us to today to get a compet...

From £1,680

(last active 19/08/26)
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JLP CAPENTRY & CONSTRUCTION

Jamie Lepage

I m good 

RSJ cost in CO15

Estimates for install an rsj near CO15

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CO15 it ranges from £1,680 (JLP CAPENTRY & CONSTRUCTION based in CO3) to £3,168 (Universal Property Services Ltd based in IP1).

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 CO15 by posting a job with HaMuch and we will send it to extension builders in CO15.


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Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Install An RSJ near Clacton-on-Sea£31£230
Install An RSJ near Tendring£31£226
Install An RSJ near Harwich£34£248
Install An RSJ near Colchester£34£232
Install An RSJ near Felixstowe£31£231
Install An RSJ near Ipswich£33£235
Install An RSJ near Maldon£36£244
Install An RSJ near Witham£36£240
Install An RSJ near Sudbury£34£229
Install An RSJ near Southend-on-Sea£37£247

Estimates for common extension builder jobs in CO15;

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.

More extensions & conversions cost guides...