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Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Image Design & Consultants is a trusted extension builder serving customers in Southall and the surrounding area. Contact us to today to get a comp...
Vital Builders are here to help customers who need an Extension Builder in Southall. We offer a competitive rate to complete all your extension bui...
Need to find an Extension Builder near you for all your extension buildering work?
J K GENERAL BUILDING LTD provides a local, trusted exten...
Hardeep Samra
MJ Builders (London) Ltd are here to help customers who need an Extension Builder in Southall. We offer a competitive rate to complete all your ext...
Trusted and professional extension builder in Southall. Experienced in all extension buildering work and keeping within budget and on quote. DC Bui...
Bill Matharu
Matharu Buildings is an established extension buildering business in Southall. We come highly recommended and provide competitive quotes for your w...
Bhupinder Singh
Trusted and professional extension builder in Southall. Experienced in all extension buildering work and keeping within budget and on quote. Elegan...
Global Building & Designs Ltd is an established and experienced local extension builder in Southall. Please contact us for a free, no obligation qu...
Southall, UB2
JD Construction is an established and experienced local extension builder in Southall. Please contact us for a free, no obligation quote and compet...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Southall it ranges from £2,152 (Global Building & Designs Ltd based in W7) to £2,512 (T M Builder based in UB4).
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 Southall by posting a job with HaMuch and we will send it to extension builders in Southall.
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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.

Underpin a building - £17,669

Two storey extension - £88,253

Build a timber frame extension - £26,169

Build a swimming pool - £81,169

Single storey extension - £58,376

Side return extension - £43,399

Install an RSJ - £2,369

Outbuilding - £10,169

Build a Mansard loft conversion - £52,169

Loft conversion - £35,333

Build a kitchen extension - £42,169

Hip to gable loft conversion - £42,169

Granny annexe - £87,169

Garden office - £10,169

Convert a Garage - £16,169

Garage - £18,669

Build a flat roof extension - £22,169

Build a dormer loft conversion - £42,169

Concrete foundations - £6,419

Convert a bungalow loft - £29,169

Convert a basement - £39,399