Khalid Osman
We agree on the work, price and appointment before starting. Our approach focuses on clear communication, punctuality, careful workmanship and leav...
Relax... you have found a reliable extension builder in Broadgate. London Trowel Co. is a friendly and reliable company based in Broadgate who cons...
Trusted and professional extension builder in Broadgate. Experienced in all extension buildering work and keeping within budget and on quote. Therm...
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
Experienced extension builder ready to quote for your work. Glenward Builders Ltd is the best extension builder in Broadgate. No obligation free qu...
CK Constructions & Development Ltd is a trusted extension builder serving customers in Broadgate and the surrounding area. Contact us to today to g...
A to Z Builders Ltd are here to help customers who need an Extension Builder in Broadgate. We offer a competitive rate to complete all your extensi...
Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in Broadgate. No obligation fre...
JK Doors is a trusted extension builder serving customers in Broadgate and the surrounding area. Contact us to today to get a competitive quote for...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Broadgate 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 Broadgate by posting a job with HaMuch and we will send it to extension builders in Broadgate.
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 - £17,632

Two storey extension - £88,198

Build a timber frame extension - £26,132

Build a swimming pool - £81,132

Single storey extension - £57,640

Side return extension - £42,985

Install an RSJ - £2,332

Outbuilding - £10,132

Build a Mansard loft conversion - £52,132

Loft conversion - £34,988

Build a kitchen extension - £42,132

Hip to gable loft conversion - £42,132

Granny annexe - £87,132

Garden office - £10,132

Convert a Garage - £16,132

Garage - £18,632

Build a flat roof extension - £22,132

Build a dormer loft conversion - £42,132

Concrete foundations - £6,382

Convert a bungalow loft - £29,132

Convert a basement - £38,985