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Jatinder Kahlon
Hi, I’m Jatinder. I’m a qualified electrician and gas safe registered professional with 10 years of experience in the trade. We specialise in l...
Need to find an Extension Builder near you for all your extension buildering work?
Slick Construction Ltd provides a local, trusted extensi...
Trusted and professional extension builder in Twickenham. Experienced in all extension buildering work and keeping within budget and on quote. TFC ...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
AG-Renovation Ltd is a trusted extension builder serving customers in Twickenham and the surrounding area. Contact us to today to get a competitive...
Elite Construction London Ltd
Elite Construction London Ltd has been one of the top providers of building and remodeling services in London for more than ten years.Our goal is ...
Relax... you have found a reliable extension builder in Twickenham. BUILDING SPACE UK LTD is a friendly and reliable company based in Twickenham wh...
Andy Harris
Andy Harris Construction is an established and experienced local extension builder in Twickenham. Please contact us for a free, no obligation quote...
BUILDING ANGELS LTD is an established extension buildering business in Twickenham. We come highly recommended and provide competitive quotes for yo...

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 Twickenham by posting a job with HaMuch and we will send it to extension builders in Twickenham.
"Basement conversion" - TW2, job posted 05/04/26
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 - £17,739

Two storey extension - £88,359

Build a timber frame extension - £26,239

Build a swimming pool - £81,239

Single storey extension - £59,784

Side return extension - £44,191

Install an RSJ - £2,439

Outbuilding - £10,239

Build a Mansard loft conversion - £52,239

Loft conversion - £35,993

Build a kitchen extension - £42,239

Hip to gable loft conversion - £42,239

Granny annexe - £87,239

Garden office - £10,239

Convert a Garage - £16,239

Garage - £18,739

Build a flat roof extension - £22,239

Build a dormer loft conversion - £42,239

Concrete foundations - £6,489

Convert a bungalow loft - £29,239

Convert a basement - £40,191