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The00Company Ltd
Homeowners look no further if you want a qualified extension builder to work in your home. The00Company Ltd are tidy and neat, providing a quality ...
EVS ARCHITECTURE & CONSTRUCTION LTD
HOW WE WORK?We are here to design the best places!Our experience includes projects all over the world, from small scaled projects to large resident...
AGK Building Services Ltd
AGK Building Services Ltd is a small family-run business with more than 20 years' experience in the building services industry. We have a team of d...
Renova PMC
Renova PMC - bespoke construction, interior designers
Abarth Construction Ltd
We are an experienced team dedicated to designing property in a way that is both beautiful and practical. For most people buying a property is an e...
From £39,390
B&B London Construction Ltd
Arben Neza (Benny)
We are focused on delivering high quality loft conversions, house extensions, full or partial house refurbishment, also maximising the full potent...
From £40,380
S E H BUILDERS LTD
Winchmore Hill, N21
Need to find an Extension Builder near you for all your extension buildering work?
S E H BUILDERS LTD provides a local, trusted extension b...
From £37,320
TIPS CONSTRUCTION
Experienced extension builder ready to quote for your work. TIPS CONSTRUCTION is the best extension builder in N21. No obligation free quotes and m...
From £39,300
NexLevel Contractors Ltd
Nexlevel - An aspiring construction and refurbishment company situated in the London. As a family-run business that is meshed with love, we believe...
From £42,090
PonariBuilders Ltd
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Cheapest builders to convert your basement in N21
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 N21 by posting a job with HaMuch and we will send it to extension builders in N21.
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Estimates for common extension builder jobs in N21;
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 - £17,666
Two storey extension - £88,250
Build a timber frame extension - £26,166
Build a swimming pool - £81,166
Single storey extension - £58,328
Side return extension - £43,372
Install an RSJ - £2,366
Outbuilding - £10,166
Build a Mansard loft conversion - £52,166
Loft conversion - £35,310
Build a kitchen extension - £42,166
Hip to gable loft conversion - £42,166
Granny annexe - £87,166
Garden office - £10,166
Convert a Garage - £16,166
Garage - £18,666
Build a flat roof extension - £22,166
Build a dormer loft conversion - £42,166
Concrete foundations - £6,416
Convert a bungalow loft - £29,166
Convert a basement - £39,372