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...
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...
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...
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...
RAF Construction Solutions is an established and experienced local extension builder in Twickenham. Please contact us for a free, no obligation quo...
Complex Renovation serving clients in London and surrounding areas providing highest standard building services.We provide a range of expert renov...

Underpinning ranges from £17,396 (Tota Builders based in TW2) to £17,916 (Andy Harris Construction based in TW9), but the final cost will depend on the method of underpinning used, how much of your foundations need underpinning and where you live.
Comparing extension builders estimates for underpinning gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
Get quotes to underpin your home in Twickenham by posting a job with HaMuch and we will send it to extension builders in Twickenham.
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 - £17,674

Two storey extension - £88,262

Build a timber frame extension - £26,174

Build a swimming pool - £81,174

Single storey extension - £58,488

Side return extension - £43,462

Install an RSJ - £2,374

Outbuilding - £10,174

Build a Mansard loft conversion - £52,174

Loft conversion - £35,385

Build a kitchen extension - £42,174

Hip to gable loft conversion - £42,174

Granny annexe - £87,174

Garden office - £10,174

Convert a Garage - £16,174

Garage - £18,674

Build a flat roof extension - £22,174

Build a dormer loft conversion - £42,174

Concrete foundations - £6,424

Convert a bungalow loft - £29,174

Convert a basement - £39,462