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

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From £21,136

Last active Jun 26
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Mount Oriel Conversions & Extensions

Location

Belfast, BT8

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

Mount Oriel Conversions & Extensions provides a local, t...

From £21,368

Last active May 26
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SM Plumbing & Heating

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

From £21,336

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Belfast Loft Company

Location

Belfast, BT17

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

From £21,296

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Ballantine building solutions

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

From £21,488

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AK Building Services

Adam King

Ak building 

From £21,176

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Extended living by Gilbert-Ash

Location

Belfast, BT12

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

From £21,384

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Designco Ltd

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

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...

From £21,264

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DGA

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

From £21,384

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Finch Construction NI

Relax... you have found a reliable extension builder in Belfast. Finch Construction NI is a friendly and reliable company based in Belfast who cons...

Flat roof extension cost in Belfast

Estimates for build a flat roof extension near Belfast

A flat roof extension ranges from the cheapest of £21,136 (Mount Oriel Conversions & Extensions based in BT8) to the dearest of £21,488 (AK Building Services based in BT8), 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 Belfast by posting a job with HaMuch. We'll send it to extension builders in Belfast.


Estimates for common extension builder jobs in Belfast;

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...