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Available extension builders in TW1 reply
Select your affordable TW1 extension builder
Need to find an Extension Builder near you for all your extension buildering work?
Slick Construction Ltd provides a local, trusted extensi...
Trusted and professional extension builder in TW1. Experienced in all extension buildering work and keeping within budget and on quote. TFC Constru...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need to find an Extension Builder near you for all your extension buildering work?
AMBUILD LTD provides a local, trusted extension builderi...
Michael Kramarz, MK Builds are here to help customers who need an Extension Builder in TW1. We offer a competitive rate to complete all your extens...
From £2,104
Twickenham, TW1
Masterbuild & Design Ltd is an established and experienced local extension builder in TW1. Please contact us for a free, no obligation quote and co...
From £2,512
Burbeck Project Management is a residential property development management company, working with clients across London to plan, design, and build ...
From £2,360
Greater London, TW1
BC 10 Builder Services are here to help customers who need an Extension Builder in TW1. We offer a competitive rate to complete all your extension ...
From £2,264
Trusted and professional extension builder in TW1. Experienced in all extension buildering work and keeping within budget and on quote. Habitus Hom...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in TW1 it ranges from £2,096 (Tota Builders based in TW2) to £2,616 (TFC Construction based in TW10).
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 TW1 by posting a job with HaMuch and we will send it to extension builders in TW1.
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 - £17,606

Two storey extension - £88,158

Build a timber frame extension - £26,106

Build a swimming pool - £81,106

Single storey extension - £57,112

Side return extension - £42,688

Install an RSJ - £2,306

Outbuilding - £10,106

Build a Mansard loft conversion - £52,106

Loft conversion - £34,740

Build a kitchen extension - £42,106

Hip to gable loft conversion - £42,106

Granny annexe - £87,106

Garden office - £10,106

Convert a Garage - £16,106

Garage - £18,606

Build a flat roof extension - £22,106

Build a dormer loft conversion - £42,106

Concrete foundations - £6,356

Convert a bungalow loft - £29,106

Convert a basement - £38,688