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.

HaMuch is Excellent

How HaMuch saves you money

Post your job for free

Post your job for free

We send your job to ALL L12 extension builders

Compare quotes

Compare quotes

Available extension builders in L12 reply

Save Money

Save Money

Select your affordable L12 extension builder

Post your job

From £2,136

Last active Nov 26
Get quotes

P & P Building Services

Peter Gallagher

Experienced extension builder ready to quote for your work. P & P Building Services is the best extension builder in L12. No obligation free quotes...

From £1,872

Last active Nov 26
Get quotes

J.M.C Building Services

J.M.C Building Services is a trusted extension builder serving customers in L12 and the surrounding area. Contact us to today to get a competitive ...

From £1,968

Last active Nov 26
Get quotes

KM Building Services

Relax... you have found a reliable extension builder in L12. KM Building Services is a friendly and reliable company based in L12 who consider no j...

From £1,904

Last active Nov 26
Get quotes

Render & External Insulation Specialist

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

From £2,104

Last active Nov 26
Get quotes

Bob the Builder

Need an Extension Builder in L12? Bob the Builder has been helping local clients (20 mile radius) with their extension buildering jobs for many yea...

From £1,752

Last active Oct 26
Get quotes

Liverpool Builder

Liverpool Builder is an established extension buildering business in L12. We come highly recommended and provide competitive quotes for your work.<...

From £1,992

Last active Sep 26
Get quotes

J J Nuttall Specialist Roofing Ltd

J J Nuttall Specialist Roofing Ltd are here to help customers who need an Extension Builder in L12. We offer a competitive rate to complete all you...

From £1,936

Last active Jul 26
Get quotes

R Sargeant

Relax... you have found a reliable extension builder in L12. R Sargeant is a friendly and reliable company based in L12 who consider no job as too ...

From £2,000

Last active Jun 26
Get quotes

Oxygen Property Partners

Experienced extension builder ready to quote for your work. Oxygen Property Partners is the best extension builder in L12. No obligation free quot...

From £1,888

Last active Apr 26
Get quotes

Hyst

Relax... you have found a reliable extension builder in L12. Hyst is a friendly and reliable company based in L12 who consider no job as too big or...

RSJ cost in L12

Estimates for install an rsj near L12

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in L12 it ranges from £1,752 (Liverpool Builder based in L12) to £2,136 (P & P Building Services based in L11).

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 L12 by posting a job with HaMuch and we will send it to extension builders in L12.

"Install an RSJ" - L36, job posted 27/09/26

"RSJ installation" - LIVERPOOL, job posted 09/04/25


Get extension builder rates instantly

Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Install An RSJ near Knowsley£31£222
Install An RSJ near Kirkby£31£224
Install An RSJ near Huyton with Roby£31£225
Install An RSJ near Prescot£31£223
Install An RSJ near Bootle£33£228
Install An RSJ near Liverpool£31£222
Install An RSJ near Maghull£34£231
Install An RSJ near Wallasey£32£224
Install An RSJ near Birkenhead£31£219
Install An RSJ near Crosby£35£234

Estimates for common extension builder jobs in L12;

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...