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Mr
Jonathan Rimmer
Experienced extension builder ready to quote for your work. Mr is the best extension builder in W11. No obligation free quotes and many happy custo...
BPS Building
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
1st & 2nd Fix Vasconstruct
Vas Constructs
RUBBERCOVER™ EPDM Permaroof rubber cover and roof system. Lead flashing. NCTS. Timber Frame Buildings. Refurbish fit out, structural ...
M & A UK Ltd
Relax... you have found a reliable extension builder in W11. M & A UK Ltd is a friendly and reliable company based in W11 who consider no job as to...
Newpark Construction
Newpark Construction are here to help customers who need an Extension Builder in W11. We offer a competitive rate to complete all your extension bu...
HUGHES BUILDERS
Experienced extension builder ready to quote for your work. HUGHES BUILDERS is the best extension builder in W11. No obligation free quotes and man...
Heaven Sent Construction
Need to find an Extension Builder near you for all your extension buildering work?
Heaven Sent Construction provides a local, trusted exten...
H G Builders
H G Builders is an established and experienced local extension builder in W11. Please contact us for a free, no obligation quote and competitive ra...
Graham Construction
Graham Construction is an established extension buildering business in W11. We come highly recommended and provide competitive quotes for your work...
JNJ Building Services Ltd
Experienced extension builder ready to quote for your work. JNJ Building Services Ltd is the best extension builder in W11. No obligation free quot...
RSJ cost in W11
How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in W11 it ranges from £2,128 (BPS Building based in NW6) to £4,040 (1st & 2nd Fix Vasconstruct based in W12).
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 W11 by posting a job with HaMuch and we will send it to extension builders in W11.
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Estimates for common extension builder jobs in W11;
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 - £17,846
Two storey extension - £88,518
Build a timber frame extension - £26,346
Build a swimming pool - £81,346
Single storey extension - £61,912
Side return extension - £45,388
Install an RSJ - £2,546
Outbuilding - £10,346
Build a Mansard loft conversion - £52,346
Loft conversion - £36,990
Build a kitchen extension - £42,346
Hip to gable loft conversion - £42,346
Granny annexe - £87,346
Garden office - £10,346
Convert a Garage - £16,346
Garage - £18,846
Build a flat roof extension - £22,346
Build a dormer loft conversion - £42,346
Concrete foundations - £6,596
Convert a bungalow loft - £29,346
Convert a basement - £41,388