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 Crook & Willington - Sort by rates or availability

Key Building Solutions

From £2,680

(rates verified 04/09/26)

On time/ professional/ time served/trustworthy

Radici Construction North East Ltd

From £3,112

(last active 03/10/26)

Trusted General Builders in Durham From small fixes to full renovations, Radici Construction delivers quality workmanship, clear communication,...

Turners Roofing Services

From £2,120

(last active 02/10/26)

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

P J N Builders

From £2,096

(last active 01/10/26)

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

2 reviews

Heritage NE Ltd

From £2,464

(last active 01/10/26)

 30 years experience In building . Plastering and colour renders 

"Totally unreliable, takes your money and doesn't finish the job." - NORTH EAST,reviewed 04/10/17, L S

D & G Builders

From £1,960

(last active 01/10/26)

Trusted and professional extension builder in Crook & Willington. Experienced in all extension buildering work and keeping within budget and on quo...

AA Paving

From £2,200

(last active 01/10/26)

Relax... you have found a reliable extension builder in Crook & Willington. AA Paving is a friendly and reliable company based in Crook & Willingto...

RAINTON CONSTRUCTION LTD

From £2,304

(last active 01/10/26)

RAINTON CONSTRUCTION LTD is an established and experienced local extension builder in Crook & Willington. Please contact us for a free, no obligati...

Empire Building Contracts

From £1,944

(last active 01/10/26)

Trusted and professional extension builder in Crook & Willington. Experienced in all extension buildering work and keeping within budget and on quo...

ANDREW HUNTER BUILDING SERVICES

From £2,008

(last active 30/09/26)

ANDREW HUNTER BUILDING SERVICES is an established and experienced local extension builder in Crook & Willington. Please contact us for a free, no o...

RSJ cost in Crook & Willington

Estimates for install an rsj near Crook & Willington

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Crook & Willington it ranges from £1,944 (Empire Building Contracts based in TS18) to £3,112 (Radici Construction North East Ltd based in DH1).

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


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Estimates for common extension builder jobs in Crook & Willington;

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...