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 £2,224

Last active Nov 26
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SH Enterprise

Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...

From £2,392

Last active Oct 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 £2,576

Last active Sep 26
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CK Constructions & Development Ltd

CK Constructions & Development Ltd is a trusted extension builder serving customers in EC1A and the surrounding area. Contact us to today to get a ...

From £2,184

Last active Sep 26
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JK Doors

JK Doors is a trusted extension builder serving customers in EC1A and the surrounding area. Contact us to today to get a competitive quote for exte...

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 EC1A. Please contact us for a free, no obligation quote and competitive ...

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 EC1A and the surrounding area. Contact us to today to get a competitive qu...

From £2,416

Last active Aug 26
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Buildwiser

Buildwiser is a trusted extension builder serving customers in EC1A and the surrounding area. Contact us to today to get a competitive quote for ex...

From £4,264

Last active Nov 25
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Q Lofts and Extensions

Anthony Sullivan

We build Lofts. We build Extensions. We undertake conversions. Our Terms and conditions apply as shown in our starter packs.

From £2,352

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plansing

Plansing Ltd

Experience the best architectural design services with PLANSING, where we flawlessly integrate innovative architectural designer products to bring ...

From £2,240

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TOP CONSTRUCTION

TOP CONSTRUCTION is an established extension buildering business in EC1A. We come highly recommended and provide competitive quotes for your work.<...

RSJ cost in EC1A

Estimates for install an rsj near EC1A

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in EC1A it ranges from £2,128 (GS Fabric Ltd based in E2) to £4,264 (Q Lofts and Extensions based in EC1R).

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 EC1A by posting a job with HaMuch and we will send it to extension builders in EC1A.


Estimates for common extension builder jobs in EC1A;

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...