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Propello
Ali Alagoz
Propello is an established and experienced local extension builder in Leyton. Please contact us for a free, no obligation quote and competitive ra...
Bspec Ltd
Mick Singh
At Building Services Contractors we pride ourselves on an efficient and friendly service, and strive to achieve 100% customer satisfaction.
From £2,376
Fedora and sons Ltd
MIHAI Martolea
Member since September 2026
Fedora and sons Ltd is a trusted extension builder serving customers in Leyton and the surrounding area. Contact us to today to get a competitive q...
CC&D BUILDING LTD
Catalin CIOBANU
Experienced extension builder ready to quote for your work. CC&D BUILDING LTD is the best extension builder in Leyton. No obligation free quotes an...
M Saleem Builders
Relax... you have found a reliable extension builder in Leyton. M Saleem Builders is a friendly and reliable company based in Leyton who consider n...
UK Drywall Ltd
UK Drywall Ltd is an established and experienced local extension builder in Leyton. Please contact us for a free, no obligation quote and competiti...
KS Plastering SERVICE
Sampson Essien
Thistle Bonding Coat: Ideal for use on low-suction backgrounds such as brick or concrete blocks, this product provided a solid foundation, Thi...
GNB Construction Builders Ltd
Trusted and professional extension builder in Leyton. Experienced in all extension buildering work and keeping within budget and on quote. GNB Cons...
G HAMID CONSTRUCTION LTD
Relax... you have found a reliable extension builder in Leyton. G HAMID CONSTRUCTION LTD is a friendly and reliable company based in Leyton who con...
Kaseno Group
Kaseno Group are here to help customers who need an Extension Builder in Leyton. We offer a competitive rate to complete all your extension builder...
RSJ cost in Leyton
How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Leyton it ranges from £2,120 (G HAMID CONSTRUCTION LTD based in E6) to £3,784 (Propello based in E17).
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 Leyton by posting a job with HaMuch and we will send it to extension builders in Leyton.
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Estimates for common extension builder jobs in Leyton;
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 - £17,781
Two storey extension - £88,421
Build a timber frame extension - £26,281
Build a swimming pool - £81,281
Single storey extension - £60,616
Side return extension - £44,659
Install an RSJ - £2,481
Outbuilding - £10,281
Build a Mansard loft conversion - £52,281
Loft conversion - £36,383
Build a kitchen extension - £42,281
Hip to gable loft conversion - £42,281
Granny annexe - £87,281
Garden office - £10,281
Convert a Garage - £16,281
Garage - £18,781
Build a flat roof extension - £22,281
Build a dormer loft conversion - £42,281
Concrete foundations - £6,531
Convert a bungalow loft - £29,281
Convert a basement - £40,659