Extend your Greenisland 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 Greenisland? To see prices and availability for your job click green button.

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From £21,368

Last active May 26
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SM Plumbing & Heating

Relax... you have found a reliable extension builder in Greenisland. SM Plumbing & Heating is a friendly and reliable company based in Greenisland ...

From £21,296

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Ballantine building solutions

Ballantine building solutions is an established extension buildering business in Greenisland. We come highly recommended and provide competitive qu...

From £21,264

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DGA

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

From £21,384

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Designco Ltd

Designco Ltd is an established extension buildering business in Greenisland. We come highly recommended and provide competitive quotes for your wor...

From £21,376

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LM Design & Build

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Flat roof extension cost in Greenisland

Estimates for build a flat roof extension near Greenisland

A flat roof extension ranges from the cheapest of £21,264 (DGA based in BT37) to the dearest of £21,384 (Designco Ltd based in BT36), 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 Greenisland by posting a job with HaMuch. We'll send it to extension builders in Greenisland.


Estimates for common extension builder jobs in Greenisland;

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.

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