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Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
Torrington Design
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO
Relax... you have found a reliable extension builder in Liverpool Street. London Trowel Co. is a friendly and reliable company based in Liverpool S...
Trusted and professional extension builder in Liverpool Street. Experienced in all extension buildering work and keeping within budget and on quote...
Experienced extension builder ready to quote for your work. Glenward Builders Ltd is the best extension builder in Liverpool Street. No obligation ...
Darren Bergin
Relax... you have found a reliable extension builder in Liverpool Street. First guard Roofing is a friendly and reliable company based in Liverpool...
CK Constructions & Development Ltd is a trusted extension builder serving customers in Liverpool Street and the surrounding area. Contact us to tod...
A to Z Builders Ltd are here to help customers who need an Extension Builder in Liverpool Street. We offer a competitive rate to complete all your ...
Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in Liverpool Street. No obligat...
JK Doors is a trusted extension builder serving customers in Liverpool Street and the surrounding area. Contact us to today to get a competitive qu...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Liverpool Street it ranges from £2,176 (A to Z Builders Ltd based in SW1P) to £2,576 (CK Constructions & Development Ltd based in WC1N).
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 Liverpool Street by posting a job with HaMuch and we will send it to extension builders in Liverpool Street.
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 - £17,646

Two storey extension - £88,218

Build a timber frame extension - £26,146

Build a swimming pool - £81,146

Single storey extension - £57,912

Side return extension - £43,138

Install an RSJ - £2,346

Outbuilding - £10,146

Build a Mansard loft conversion - £52,146

Loft conversion - £35,115

Build a kitchen extension - £42,146

Hip to gable loft conversion - £42,146

Granny annexe - £87,146

Garden office - £10,146

Convert a Garage - £16,146

Garage - £18,646

Build a flat roof extension - £22,146

Build a dormer loft conversion - £42,146

Concrete foundations - £6,396

Convert a bungalow loft - £29,146

Convert a basement - £39,138