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 Get quotes.

HaMuch is Excellent

Install an RSJ cost in B27 - Sort by rates or availability

From £2,248

Member since October 2026

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Darthy serices and cleaning

Khondda Olham

We agree on the work, price and appointment before starting. Our approach focuses on clear communication, punctuality, careful workmanship and leav...

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 £2,080

Last active Sep 26
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IMAGE BUILDING SERVICES LMT

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

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 B27. F.I.I Building Services Ltd is a friendly and reliable company based in B27 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 B27. No obligation free quotes and many happy...

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...

From £2,184

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Fletchers Building & Maintenance, Ltd.

Cleaveland Fletcher

Fletcher's Building & Maintenance are a family owned business that understands, in order to achieve our continued success our customers and the...

RSJ cost in B27

Estimates for install an rsj near B27

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in B27 it ranges from £1,224 (J s building & maintenance services limited based in B26) to £2,248 (Darthy serices and cleaning based in B5).

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 B27 by posting a job with HaMuch and we will send it to extension builders in B27.

"RSJ installation" - B90, job posted 03/08/26

"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


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Estimates for common extension builder jobs in B27;

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...