Extend your Greenwich with an extension

A flat roof extension is a great way to add extra space to your home without splashing out on the costs of a pitched roof extension. Often exempt from planning permission rules, you can build a flat roof extension up to 3 metres in height as long as it's not visible from a road. But how much do they cost in Greenwich? To see prices and availability for your job click green button.

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From £22,376

Last active Nov 26
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Exquisite Design & Build Ltd

Need an Extension Builder in Greenwich? Exquisite Design & Build Ltd has been helping local clients (5 mile radius) with their extension buildering...

From £22,088

Last active Sep 26
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AM Builder

Trusted and professional extension builder in Greenwich. Experienced in all extension buildering work and keeping within budget and on quote. AM Bu...

From £22,240

Last active Sep 26
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Charlie Builder

Trusted and professional extension builder in Greenwich. Experienced in all extension buildering work and keeping within budget and on quote. Charl...

From £21,616

Last active Sep 26
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Jmc buildets

Jay Christenson

Experienced extension builder ready to quote for your work. Jmc buildets is the best extension builder in Greenwich. No obligation free quotes and ...

From £21,936

Last active Sep 26
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RLD Contractors Ltd

RLD Contractors Ltd is an established and experienced local extension builder in Greenwich. Please contact us for a free, no obligation quote and c...

From £21,960

Last active Aug 26
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Rapid Bee Ltd

Rapid Bee Ltd is an established extension buildering business in Greenwich. We come highly recommended and provide competitive quotes for your work...

From £22,200

Last active May 26
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ROOSE CONSTRUCTION LTD

Trusted and professional extension builder in Greenwich. Experienced in all extension buildering work and keeping within budget and on quote. ROOSE...

From £22,264

Last active May 26
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Andy Tunmer Building Services

Andy Tunmer Building Services is an established and experienced local extension builder in Greenwich. Please contact us for a free, no obligation q...

From £22,136

Last active Apr 26
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Hartigans Construction

Andy Hart

Need to find an Extension Builder near you for all your extension buildering work?

Hartigans Construction provides a local, trusted extensi...

From £22,152

Last active Jan 26
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S G Painting Contractor Ltd

Relax... you have found a reliable extension builder in Greenwich. S G Painting Contractor Ltd is a friendly and reliable company based in Greenwic...

Flat roof extension cost in Greenwich

Estimates for build a flat roof extension near Greenwich

A flat roof extension ranges from the cheapest of £21,616 (Jmc buildets based in SE9) to the dearest of £22,376 (Exquisite Design & Build Ltd based in SE16), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes. 

Find out how much your flat roof extension will cost in Greenwich by posting a job with HaMuch. We'll send it to extension builders in Greenwich.


Estimates for common extension builder jobs 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.

More extensions & conversions cost guides...