From £17,828
London, E6
Trusted and professional extension builder in E6. Experienced in all extension buildering work and keeping within budget and on quote. Y & O Decora...
From £17,700
M&J Builders is a trusted extension builder serving customers in E6 and the surrounding area. Contact us to today to get a competitive quote for ex...
From £17,884
East Ham, E6
Trusted and professional extension builder in E6. Experienced in all extension buildering work and keeping within budget and on quote. MICHAELS UNI...
From £17,700
Relax... you have found a reliable extension builder in E6. Derryard Construction Ltd is a friendly and reliable company based in E6 who consider n...
From £17,660
Experienced extension builder ready to quote for your work. PJ Lane is the best extension builder in E6. No obligation free quotes and many happy c...
From £16,532
Relax... you have found a reliable extension builder in E6. Animus Construction Ltd is a friendly and reliable company based in E6 who consider no ...
From £17,740
Albion RA offers complete construction solutions for residential clients across Kent\nand the surrounding areas.\n\nOur specialist team has many ye...
From £17,788
Need an Extension Builder in E6? Rich Designz Ltd has been helping local clients (5 mile radius) with their extension buildering jobs for many year...
From £17,484
London's leading bespoke design and build specialists! Let us help you turn your dream home into a reality. Don't delay contact us today for a firs...
From £17,740
Trusted and professional extension builder in E6. Experienced in all extension buildering work and keeping within budget and on quote. Charlie Buil...

Underpinning ranges from £16,532 (Animus Construction Ltd based in E6) to £17,884 (MICHAELS UNITED TRADESMAN BUILD based in E6), 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 E6 by posting a job with HaMuch and we will send it to extension builders in E6.
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