From £17,756
Need an Extension Builder in EC4V? Flow Property Services has been helping local clients (5 mile radius) with their extension buildering jobs for m...
From £17,492
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,604
SCANDIIN is an established and experienced local extension builder in EC4V. Please contact us for a free, no obligation quote and competitive rates...
From £17,892
We have the experience and knowledge to carry out any project, big or small. Our team of experts thoroughly plan the budget and manage your projec...
From £17,772
Need an Extension Builder in EC4V? Aylaa Exclusive has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...
From £17,596
Omniform are here to help customers who need an Extension Builder in EC4V. We offer a competitive rate to complete all your extension buildering jo...
From £17,788
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,844
Elite Building is an established extension buildering business in EC4V. We come highly recommended and provide competitive quotes for your work.
From £17,988
Elite Building And Heating was founded by Davinder Dhanda in 2018. Based in Central London, Davinder Worked on Construction sites since the age of ...
From £17,700
Experienced extension builder ready to quote for your work. Space Design Construction Services Ltd is the best extension builder in EC4V. No obliga...

Underpinning ranges from £17,492 (SDL PKB based in Ec4a) to £17,988 (Elite Building based in WC2A), 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 EC4V by posting a job with HaMuch and we will send it to extension builders in EC4V.
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 - £17,743

Two storey extension - £88,365

Build a timber frame extension - £26,243

Build a swimming pool - £81,243

Single storey extension - £59,864

Side return extension - £44,236

Install an RSJ - £2,443

Outbuilding - £10,243

Build a Mansard loft conversion - £52,243

Loft conversion - £36,030

Build a kitchen extension - £42,243

Hip to gable loft conversion - £42,243

Granny annexe - £87,243

Garden office - £10,243

Convert a Garage - £16,243

Garage - £18,743

Build a flat roof extension - £22,243

Build a dormer loft conversion - £42,243

Concrete foundations - £6,493

Convert a bungalow loft - £29,243

Convert a basement - £40,236