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. 

Install an RSJ cost in UB11 - Sort by rates or availability

From £2,376
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Self employed

(rates verified 05/10/26)

Hight quality of jobs

From £2,248
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J&J Building Solutions

(rates verified 18/09/26)

Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in UB11. No obligation free quotes...

From £2,624
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LALI BUILDERS

(last active 07/10/26)

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

From £2,296
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Matharu Buildings

(last active 06/10/26)

Matharu Buildings is an established extension buildering business in UB11. We come highly recommended and provide competitive quotes for your work....

From £2,512
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T M Builder

(last active 06/10/26)

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

From £2,368
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Best Builders

(last active 06/10/26)

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

From £2,200
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EB Construction & Building Ltd

Member since July 2020

EB Construction & Building Ltd are here to help customers who need an Extension Builder in UB11. We offer a competitive rate to complete all your e...

From £2,560
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M & A UK Ltd

(last active 06/10/26)

Relax... you have found a reliable extension builder in UB11. M & A UK Ltd is a friendly and reliable company based in UB11 who consider no job as ...

From £2,392
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1 review

Torrington

(last active 06/10/26)

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 £2,632
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MM-Builders

(last active 06/10/26)

Maintenance and repair 

Family run business from 2006

 

 

RSJ cost in UB11

Estimates for install an rsj near UB11

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in UB11 it ranges from £2,200 (EB Construction & Building Ltd based in HP2) to £2,632 (MM-Builders based in N9).

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 UB11 by posting a job with HaMuch and we will send it to extension builders in UB11.


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Estimates for common extension builder jobs in UB11;

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...