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.  To see prices and availability for your job click green button.

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From £2,184

Last active Nov 26
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JK Doors

JK Doors is a trusted extension builder serving customers in Blackfriars and the surrounding area. Contact us to today to get a competitive quote f...

From £2,392

Last active Nov 26

1 review

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Torrington

Torrington Design

NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...

"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO

From £2,408

Last active Oct 26
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Thermodynamic Building Services Ltd

Trusted and professional extension builder in Blackfriars. Experienced in all extension buildering work and keeping within budget and on quote. The...

From £2,576

Last active Sep 26
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CK Constructions & Development Ltd

CK Constructions & Development Ltd is a trusted extension builder serving customers in Blackfriars and the surrounding area. Contact us to today to...

From £2,176

Last active Sep 26
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A to Z Builders Ltd

A to Z Builders Ltd are here to help customers who need an Extension Builder in Blackfriars. We offer a competitive rate to complete all your exten...

From £2,448

Last active Sep 26
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Cornerstones Construction

Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in Blackfriars. No obligation f...

From £2,128

Last active Sep 26
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GS Fabric Ltd

GS Fabric Ltd is an established and experienced local extension builder in Blackfriars. Please contact us for a free, no obligation quote and compe...

From £2,240

Last active Sep 26
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JM Building Services

JM Building Services is a trusted extension builder serving customers in Blackfriars and the surrounding area. Contact us to today to get a competi...

From £2,456

Last active Sep 26
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DUWIX BUILDING MAINTENANCE

DUWIX BUILDING MAINTENANCE are here to help customers who need an Extension Builder in Blackfriars. We offer a competitive rate to complete all you...

From £2,296

Last active Sep 26
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Building and Plastering Solution

Peter Cesma

Experienced builder in all aspects of building works. All work guaranteed. Quality finish, promt ,honest and reliable services.  Public liabil...

RSJ cost in Blackfriars

Estimates for install an rsj near Blackfriars

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Blackfriars it ranges from £2,128 (GS Fabric Ltd based in E2) to £2,576 (CK Constructions & Development Ltd based in WC1N).

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


Estimates for common extension builder jobs in Blackfriars;

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...