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Slick Construction Ltd
Need to find an Extension Builder near you for all your extension buildering work?
Slick Construction Ltd provides a local, trusted extensi...
TFC Construction
Trusted and professional extension builder in TW1. Experienced in all extension buildering work and keeping within budget and on quote. TFC Constru...
Hawaii Ltd
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Tota Builders
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
AMBUILD LTD
Need to find an Extension Builder near you for all your extension buildering work?
AMBUILD LTD provides a local, trusted extension builderi...
Michael Kramarz, MK Builds
Michael Kramarz, MK Builds are here to help customers who need an Extension Builder in TW1. We offer a competitive rate to complete all your extens...
From £36,420
Masterbuild & Design Ltd
Twickenham, TW1
Masterbuild & Design Ltd is an established and experienced local extension builder in TW1. Please contact us for a free, no obligation quote and co...
From £41,010
Burbeck Project Management
Burbeck Project Management is a residential property development management company, working with clients across London to plan, design, and build ...
From £39,300
BC 10 Builder Services
Greater London, TW1
BC 10 Builder Services are here to help customers who need an Extension Builder in TW1. We offer a competitive rate to complete all your extension ...
From £38,220
Habitus Home Improvements
Trusted and professional extension builder in TW1. Experienced in all extension buildering work and keeping within budget and on quote. Habitus Hom...
Cheapest builders to convert your basement in TW1
Comparing extension builders estimates for a Convert a basement 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 to convert a basement in TW1 by posting a job with HaMuch and we will send it to extension builders in TW1.
"Basement conversion" - TW2, job posted 05/04/26
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Estimates for common extension builder jobs in TW1;
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 - £17,606
Two storey extension - £88,158
Build a timber frame extension - £26,106
Build a swimming pool - £81,106
Single storey extension - £57,112
Side return extension - £42,688
Install an RSJ - £2,306
Outbuilding - £10,106
Build a Mansard loft conversion - £52,106
Loft conversion - £34,740
Build a kitchen extension - £42,106
Hip to gable loft conversion - £42,106
Granny annexe - £87,106
Garden office - £10,106
Convert a Garage - £16,106
Garage - £18,606
Build a flat roof extension - £22,106
Build a dormer loft conversion - £42,106
Concrete foundations - £6,356
Convert a bungalow loft - £29,106
Convert a basement - £38,688