Stuart Cooke
S Cooke Building Services is an established and experienced local extension builder in E18. Please contact us for a free, no obligation quote and c...
ASV Development Ltd are here to help customers who need an Extension Builder in E18. We offer a competitive rate to complete all your extension bui...
UK Drywall Ltd is an established and experienced local extension builder in E18. Please contact us for a free, no obligation quote and competitive ...
Need to find an Extension Builder near you for all your extension buildering work?
Dragan Building Construction provides a local, trusted e...
Ilirjan Sheqja
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
KJ Darby Building Contracts Ltd is an established and experienced local extension builder in E18. Please contact us for a free, no obligation quote...
Expert Crew Ltd is an established and experienced local extension builder in E18. Please contact us for a free, no obligation quote and competitive...
From £2,120
CHRIS BUILDER is an established and experienced local extension builder in E18. Please contact us for a free, no obligation quote and competitive r...
From £2,584
Concept Building Solutions is a trusted extension builder serving customers in E18 and the surrounding area. Contact us to today to get a competiti...
From £2,072
M & D BUILDING & DECORATING are here to help customers who need an Extension Builder in E18. We offer a competitive rate to complete all your exten...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in E18 it ranges from £2,072 (Dragan Building Construction based in E10) to £3,512 (Iservices-uk.org 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 E18 by posting a job with HaMuch and we will send it to extension builders in E18.
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 - £17,749

Two storey extension - £88,373

Build a timber frame extension - £26,249

Build a swimming pool - £81,249

Single storey extension - £59,976

Side return extension - £44,299

Install an RSJ - £2,449

Outbuilding - £10,249

Build a Mansard loft conversion - £52,249

Loft conversion - £36,083

Build a kitchen extension - £42,249

Hip to gable loft conversion - £42,249

Granny annexe - £87,249

Garden office - £10,249

Convert a Garage - £16,249

Garage - £18,749

Build a flat roof extension - £22,249

Build a dormer loft conversion - £42,249

Concrete foundations - £6,499

Convert a bungalow loft - £29,249

Convert a basement - £40,299