From £17,372
Waltham Cross, EN8
Experienced extension builder ready to quote for your work. Isc Building And Maintenance is the best extension builder in EN8. No obligation free q...
From £17,396
Experienced extension builder ready to quote for your work. MERT BUILDERS is the best extension builder in EN8. No obligation free quotes and many ...
From £17,844
Hertfordshire, EN8
Roberts & Co is a family run business est.2009. We specialize in Kitchen extensions and Loft conversions, and cover Hertfordshire, Essex and Greate...
From £17,692
Trusted and professional extension builder in EN8. Experienced in all extension buildering work and keeping within budget and on quote. Jiggins & S...
From £17,884
Waltham Cross, EN8
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,836
Experienced extension builder ready to quote for your work. SBH Construction Group is the best extension builder in EN8. No obligation free quotes ...
From £17,764
Waltham Cross, EN8
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,892
Trusted and professional extension builder in EN8. Experienced in all extension buildering work and keeping within budget and on quote. QUAD BUILDI...
From £17,772
Herts Renovations is a trusted extension builder serving customers in EN8 and the surrounding area. Contact us to today to get a competitive quote ...
From £17,644
Trusted and professional extension builder in EN8. Experienced in all extension buildering work and keeping within budget and on quote. PM Heating ...

Underpinning ranges from £17,372 (Isc Building And Maintenance based in EN8) to £17,892 (QUAD BUILDING SERVICES based in EN8), 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 EN8 by posting a job with HaMuch and we will send it to extension builders in EN8.
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 - £17,710

Two storey extension - £88,314

Build a timber frame extension - £26,210

Build a swimming pool - £81,210

Single storey extension - £59,192

Side return extension - £43,858

Install an RSJ - £2,410

Outbuilding - £10,210

Build a Mansard loft conversion - £52,210

Loft conversion - £35,715

Build a kitchen extension - £42,210

Hip to gable loft conversion - £42,210

Granny annexe - £87,210

Garden office - £10,210

Convert a Garage - £16,210

Garage - £18,710

Build a flat roof extension - £22,210

Build a dormer loft conversion - £42,210

Concrete foundations - £6,460

Convert a bungalow loft - £29,210

Convert a basement - £39,858