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

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From £21,976

Last active Nov 26
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Nathan Thomas Plumbing

Nathan Thomas

Nathan Thomas Plumbing is an established extension buildering business in Knowsley. We come highly recommended and provide competitive quotes for y...

From £21,936

Last active Nov 26
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P & P Building Services

Peter Gallagher

Experienced extension builder ready to quote for your work. P & P Building Services is the best extension builder in Knowsley. No obligation free q...

From £21,672

Last active Nov 26
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J.M.C Building Services

J.M.C Building Services is a trusted extension builder serving customers in Knowsley and the surrounding area. Contact us to today to get a competi...

From £21,768

Last active Nov 26
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KM Building Services

Relax... you have found a reliable extension builder in Knowsley. KM Building Services is a friendly and reliable company based in Knowsley who con...

From £21,872

Last active Nov 26
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G. Finnigan Builders

G. Finnigan Builders is an established extension buildering business in Knowsley. We come highly recommended and provide competitive quotes for you...

From £21,704

Last active Nov 26
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Render & External Insulation Specialist

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

From £21,904

Last active Nov 26
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Bob the Builder

Need an Extension Builder in Knowsley? Bob the Builder has been helping local clients (20 mile radius) with their extension buildering jobs for man...

From £21,824

Last active Nov 26
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Warrington Builders

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

From £21,664

Last active Nov 26
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KMC Brickwork

Need an Extension Builder in Knowsley? KMC Brickwork has been helping local clients (20 mile radius) with their extension buildering jobs for many ...

From £21,608

Last active Nov 26
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M L R Building Services

Mark Robinson

Trusted and professional extension builder in Knowsley. Experienced in all extension buildering work and keeping within budget and on quote. M L R ...

Flat roof extension cost in Knowsley

Estimates for build a flat roof extension near Knowsley

A flat roof extension ranges from the cheapest of £21,608 (M L R Building Services based in WA11) to the dearest of £21,976 (Nathan Thomas Plumbing based in L19), 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 Knowsley by posting a job with HaMuch. We'll send it to extension builders in Knowsley.


Estimates for common extension builder jobs in Knowsley;

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...