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 £2,312

Last active Nov 26
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JJSR Construction Ltd

J Wijayamohan

JJSR Construction Ltd is an established and experienced local extension builder in HA3. Please contact us for a free, no obligation quote and compe...

From £2,296

Last active Oct 26
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RLC Construction

RLC Construction are here to help customers who need an Extension Builder in HA3. We offer a competitive rate to complete all your extension builde...

From £2,272

Last active Oct 26
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Chrysalis

Location

Wealdstone, HA3

Chrysalis are here to help customers who need an Extension Builder in HA3. We offer a competitive rate to complete all your extension buildering jo...

From £2,360

Last active Oct 26
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PERFORMA CONSTRUCTION LIMITED

Relax... you have found a reliable extension builder in HA3. PERFORMA CONSTRUCTION LIMITED is a friendly and reliable company based in HA3 who cons...

From £2,424

Last active Oct 26
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Volton Building & Paving

Volton Building & Paving is a trusted extension builder serving customers in HA3 and the surrounding area. Contact us to today to get a competitive...

From £2,632

Last active Oct 26
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Platinum Premier Projects & Premier Electrics

Platinum Electrics is a Branch off Platinum Premier Projects who deal in all types of construction projects. Platinum Electrics are based in London...

From £2,360

Last active Jul 26
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BR Building Services Limited

BR Building Services Limited is a trusted extension builder serving customers in HA3 and the surrounding area. Contact us to today to get a competi...

From £2,152

Last active Jul 26
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A D C BUILDERS

Trusted and professional extension builder in HA3. Experienced in all extension buildering work and keeping within budget and on quote. A D C BUILD...

From £2,200

Last active Jul 26
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EUROCONTRACTOR LIMITED

Karsan Dabasia

Location

Harrow, HA3

Trusted and professional extension builder in HA3. Experienced in all extension buildering work and keeping within budget and on quote. EUROCONTRAC...

From £2,184

Last active Jul 26
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Stamp Design & Build Ltd

Stamp Design & Build Ltd is a trusted extension builder serving customers in HA3 and the surrounding area. Contact us to today to get a competitive...

RSJ cost in HA3

Estimates for install an rsj near HA3

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in HA3 it ranges from £2,152 (A D C BUILDERS based in HA1) to £2,632 (Platinum Premier Projects & Premier Electrics based in HA7).

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 HA3 by posting a job with HaMuch and we will send it to extension builders in HA3.


Estimates for common extension builder jobs in HA3;

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...