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Propello
Ali Alagoz
Greater London, E17
Propello is an established and experienced local extension builder in E17. Please contact us for a free, no obligation quote and competitive rates...
UK Drywall Ltd
UK Drywall Ltd is an established and experienced local extension builder in E17. Please contact us for a free, no obligation quote and competitive ...
2nwest Builders and Decorators Ltd
London, E17
Relax... you have found a reliable extension builder in E17. 2nwest Builders and Decorators Ltd is a friendly and reliable company based in E17 who...
Dakus Construction Ltd
Dakus Construction Ltd are here to help customers who need an Extension Builder in E17. We offer a competitive rate to complete all your extension ...
Dragan Building Construction
Need to find an Extension Builder near you for all your extension buildering work?
Dragan Building Construction provides a local, trusted e...
J&H Builder
J&H Builder is a trusted extension builder serving customers in E17 and the surrounding area. Contact us to today to get a competitive quote for ex...
M & D BUILDING & DECORATING
Walthamstow, E17
M & D BUILDING & DECORATING are here to help customers who need an Extension Builder in E17. We offer a competitive rate to complete all your exten...
MEGABUILD LTD
MEGABUILD LTD is a trusted extension builder serving customers in E17 and the surrounding area. Contact us to today to get a competitive quote for ...
John Ghanie
Walthamstow, E17
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Mehar builders limited
Mehar Allahdeta
Experienced extension builder ready to quote for your work. Mehar builders limited is the best extension builder in E17. No obligation free quotes...
Cheapest builders for loft conversion in E17
Comparing extension builders estimates for Loft conversion gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost of a loft conversion in E17 by posting your job to extension builders in E17.
"Loft conversion" - E17, job posted 01/01/70
"Loft conversion Double storey extension" - E18, job posted 08/09/25
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Estimates for common extension builder jobs in E17;
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 - £17,682
Two storey extension - £88,274
Build a timber frame extension - £26,182
Build a swimming pool - £81,182
Single storey extension - £58,648
Side return extension - £43,552
Install an RSJ - £2,382
Outbuilding - £10,182
Build a Mansard loft conversion - £52,182
Loft conversion - £35,460
Build a kitchen extension - £42,182
Hip to gable loft conversion - £42,182
Granny annexe - £87,182
Garden office - £10,182
Convert a Garage - £16,182
Garage - £18,682
Build a flat roof extension - £22,182
Build a dormer loft conversion - £42,182
Concrete foundations - £6,432
Convert a bungalow loft - £29,182
Convert a basement - £39,552