From £17,436
Trusted and professional extension builder in Richmond Upon Thames. Experienced in all extension buildering work and keeping within budget and on q...
From £17,804
Silver Horizon Installers Ltd is an established extension buildering business in Richmond Upon Thames. We come highly recommended and provide compe...
From £17,484
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,588
Cube Lofts is an established and experienced local extension builder in Richmond Upon Thames. Please contact us for a free, no obligation quote and...
From £17,652
IMKO is an established and experienced local extension builder in Richmond Upon Thames. Please contact us for a free, no obligation quote and compe...
From £17,780
Need to find an Extension Builder near you for all your extension buildering work?
Sharp Projects London Limited provides a local, trusted ...
From £17,796
B26 Ltd is an established and experienced local extension builder in Richmond Upon Thames. Please contact us for a free, no obligation quote and co...
From £17,780
Need to find an Extension Builder near you for all your extension buildering work?
D GAFFNEY D G BUILDERS & CO provides a local, trusted ex...
From £17,428
Relax... you have found a reliable extension builder in Richmond Upon Thames. REED CONSTRUCTION LTD is a friendly and reliable company based in Ric...
From £17,404
Masterbuild & Design Ltd is an established and experienced local extension builder in Richmond Upon Thames. Please contact us for a free, no obliga...

Underpinning ranges from £17,404 (Masterbuild & Design Ltd based in TW1) to £17,804 (Silver Horizon Installers Ltd based in TW11), 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 Richmond Upon Thames by posting a job with HaMuch and we will send it to extension builders in Richmond Upon Thames.
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 - £17,615

Two storey extension - £88,173

Build a timber frame extension - £26,115

Build a swimming pool - £81,115

Single storey extension - £57,304

Side return extension - £42,796

Install an RSJ - £2,315

Outbuilding - £10,115

Build a Mansard loft conversion - £52,115

Loft conversion - £34,830

Build a kitchen extension - £42,115

Hip to gable loft conversion - £42,115

Granny annexe - £87,115

Garden office - £10,115

Convert a Garage - £16,115

Garage - £18,615

Build a flat roof extension - £22,115

Build a dormer loft conversion - £42,115

Concrete foundations - £6,365

Convert a bungalow loft - £29,115

Convert a basement - £38,796