From £17,628
Experienced extension builder ready to quote for your work. Storeyboard is the best extension builder in Greenwich. No obligation free quotes and m...
From £17,700
Greenwich Greater London, SE10
Storeyboard work on projects of all sizes from outhouses and extensions to full renovations and commercial projects.We offer a complete and bespoke...
From £17,772
Experienced extension builder ready to quote for your work. Prestige Roofing Limited is the best extension builder in Greenwich. No obligation free...
From £17,420
Greenwich, SE10
Trusted and professional extension builder in Greenwich. Experienced in all extension buildering work and keeping within budget and on quote. Trafa...
From £17,548
Experienced extension builder ready to quote for your work. AZC BUILDING SERVICES is the best extension builder in Greenwich. No obligation free qu...
From £17,932
Island design & Construction Ltd are here to help customers who need an Extension Builder in Greenwich. We offer a competitive rate to complete all...
From £17,716
Our building services company Demiri Builder Ltd has 15 years’ experience in the industry. We have been helping customers in Lewisham and the sur...
From £17,540
Dule Vida Property Design Ltd is a trusted extension builder serving customers in Greenwich and the surrounding area. Contact us to today to get a ...
From £17,404
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,620
CG Design & Build is a boutique architectural design agency with in-house construction teams, delivering unique one-off residential and commercial...

Underpinning ranges from £17,404 (CG Design and Build LTD. based in e14) to £17,932 (Island design & Construction Ltd based in E14), 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 Greenwich by posting a job with HaMuch and we will send it to extension builders in Greenwich.
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 - £17,628

Two storey extension - £88,192

Build a timber frame extension - £26,128

Build a swimming pool - £81,128

Single storey extension - £57,560

Side return extension - £42,940

Install an RSJ - £2,328

Outbuilding - £10,128

Build a Mansard loft conversion - £52,128

Loft conversion - £34,950

Build a kitchen extension - £42,128

Hip to gable loft conversion - £42,128

Granny annexe - £87,128

Garden office - £10,128

Convert a Garage - £16,128

Garage - £18,628

Build a flat roof extension - £22,128

Build a dormer loft conversion - £42,128

Concrete foundations - £6,378

Convert a bungalow loft - £29,128

Convert a basement - £38,940