From £38,940
Experienced extension builder ready to quote for your work. Storeyboard is the best extension builder in Greenwich. No obligation free quotes and m...
From £39,750
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 £40,560
Experienced extension builder ready to quote for your work. Prestige Roofing Limited is the best extension builder in Greenwich. No obligation free...
From £36,600
Greenwich, SE10
Trusted and professional extension builder in Greenwich. Experienced in all extension buildering work and keeping within budget and on quote. Trafa...
From £38,040
Experienced extension builder ready to quote for your work. AZC BUILDING SERVICES is the best extension builder in Greenwich. No obligation free qu...
From £42,360
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 £39,930
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 £37,950
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 £36,420
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £38,850
CG Design & Build is a boutique architectural design agency with in-house construction teams, delivering unique one-off residential and commercial...

Comparing extension builders estimates for a Convert a basement gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost to convert a basement 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