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 £2,024

Last active Oct 26
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G Wilson Building & Roofing Services

Gary Wilson

Reliable person 25 years experience 

if you look on a website rated people and have a look at my ratings 

From £2,144

Last active Oct 26
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Avonvale Garage Doors

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

Avonvale Garage Doors provides a local, trusted extensio...

From £1,904

Last active Sep 26
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AJ Home Improvements

AJ Home Improvements is an established extension buildering business in B11. We come highly recommended and provide competitive quotes for your wor...

From £2,184

Last active Sep 26
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Brickfast Builders

Brickfast Builders is an established extension buildering business in B11. We come highly recommended and provide competitive quotes for your work....

From £1,928

Last active Sep 26
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F.I.I Building Services Ltd

Relax... you have found a reliable extension builder in B11. F.I.I Building Services Ltd is a friendly and reliable company based in B11 who consid...

From £2,168

Last active Mar 26
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Birch Group

We are a forward thinking, award winning design and build company based in Solihull in the West Midlands. We strive to deliver the best experience ...

From £2,120

Last active Nov 25
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x10hosts

Experienced extension builder ready to quote for your work. x10hosts is the best extension builder in B11. No obligation free quotes and many happy...

From £1,896

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BellTrim Wood Products

Need an Extension Builder in B11? BellTrim Wood Products has been helping local clients (20 mile radius) with their extension buildering jobs for m...

From £1,632

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A45 Fencing & Landscapes

Peter Smith

Reliable and trustworthy 

Also on checkatrafe

From £1,224

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j s building & maintenance services limited

JAMES Crawford

we have over 13 years exp

we go that extra mile to make sure customers are 100 % happy

we cover a 20 miles radus for b26 area...

RSJ cost in B11

Estimates for install an rsj near B11

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in B11 it ranges from £1,224 (J s building & maintenance services limited based in B26) to £2,184 (Brickfast Builders based in B6).

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 B11 by posting a job with HaMuch and we will send it to extension builders in B11.

"Removal of 3 walls and 3 RSJ installations to extend a kitchen. Need for a structual engineering consultation and building control approval since at least one wall will be load bearing." - BIRMINGHAM, job posted 05/05/24

"RSJ installation" - BIRMINGHAM, job posted 01/03/25


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Estimates for common extension builder jobs in B11;

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...