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. 

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Install an RSJ cost in SE21

Create Bespoke

From £2,416

Location

Greater London, SE21

Create Bespoke is a team of design and build experts, specialising in bespoke and luxury finishes. Your vision is at the heart of our process. Thro...

babar Jeweler Shop

From £2,704

Business Email:info@ Glazing & Boarding With local glaziers available 24 hours a day, 7 days a week we...

RCB Group Design & Build

From £2,184

Location

London, SE21

No Call out charges! 

All Jobs Fully Insured and Guaranteed !!!

All aspects of Plumbing, Heating and Drains....

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Parallax Project Management

From £2,552

We are Parallax and specialise in Construction Project Management and Design and Build with year long experience in the London high end residential...

St Ives Decor

From £2,568

Need to find an Extension Builder near you for all your extension buildering work?

St Ives Decor provides a local, trusted extension builde...

Martin's Builders & Decorators

From £2,488

Martin's Builders & Decorators is a trusted extension builder serving customers in SE21 and the surrounding area. Contact us to today to get a comp...

Urban London Development

From £2,512

Urban London Development is an established extension buildering business in SE21. We come highly recommended and provide competitive quotes for you...

BERNARD CONSTRUCTION LTD

From £2,472

BERNARD CONSTRUCTION LTD are here to help customers who need an Extension Builder in SE21. We offer a competitive rate to complete all your extensi...

JM Property Maintenance

From £2,528

Trusted and professional extension builder in SE21. Experienced in all extension buildering work and keeping within budget and on quote. JM Propert...

Buci builders ltd

From £3,224

Buci builders ltd is a trusted extension builder serving customers in SE21 and the surrounding area. Contact us to today to get a competitive quote...

RSJ cost in SE21

Estimates for install an rsj near SE21

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SE21 it ranges from £2,184 (RCB Group Design & Build based in SE21) to £3,224 (Buci builders ltd based in SE27).

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 SE21 by posting a job with HaMuch and we will send it to extension builders in SE21.


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Estimates for common extension builder jobs in SE21;

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...