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 SW1 and the surrounding area. Contact us to today to get a competitive quote for exten...

From £2,520

Last active Sep 26
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D & G Building & Decorating

Experienced extension builder ready to quote for your work. D & G Building & Decorating is the best extension builder in SW1. No obligation free qu...

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 SW1 and the surrounding area. Contact us to today to get a c...

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 SW1. We offer a competitive rate to complete all your extension bui...

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 SW1. No obligation free quot...

From £2,456

Last active Aug 26
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F & F Building Services

F & F Building Services is an established extension buildering business in SW1. We come highly recommended and provide competitive quotes for your ...

From £2,184

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Palm Property Developments Ltd

Experienced extension builder ready to quote for your work. Palm Property Developments Ltd is the best extension builder in SW1. No obligation free...

From £2,176

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KÖK London ltd.

Need an Extension Builder in SW1? KÖK London ltd. has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...

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 £408

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London Design And Build

London Design And Build

Here at London Design and Build, our team of architects, interior designers, structural engineers and contractors, offer a bespoke, turn-key servic...

RSJ cost in SW1

Estimates for install an rsj near SW1

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SW1 it ranges from £408 (London Design And Build based in SW1A) 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 SW1 by posting a job with HaMuch and we will send it to extension builders in SW1.


Estimates for common extension builder jobs in SW1;

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...