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

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From £21,920

Rates updated Oct 26
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Lp Townsend Brickwork

Lee Townsend

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

Lp Townsend Brickwork provides a local, trusted extensio...

From £21,944

Last active Nov 26
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Ava Constructions & Decors Ltd

Need an Extension Builder in Denham? Ava Constructions & Decors Ltd has been helping local clients (10 mile radius) with their extension buildering...

From £22,312

Last active Nov 26
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T M Builder

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

From £22,096

Last active Nov 26
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Matharu Buildings

Bill Matharu

Matharu Buildings is an established extension buildering business in Denham. We come highly recommended and provide competitive quotes for your wor...

From £22,112

Last active Nov 26
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JJSR Construction Ltd

J Wijayamohan

JJSR Construction Ltd is an established and experienced local extension builder in Denham. Please contact us for a free, no obligation quote and co...

From £22,464

Last active Oct 26
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AV Home Improvements

In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...

From £22,424

Last active Oct 26
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Sharp Building Ltd

Sharp Building Ltd is an established and experienced local extension builder in Denham. Please contact us for a free, no obligation quote and compe...

From £22,024

Last active Oct 26
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Mario Prajar Building Services

Mario Prajar Building Services is an established and experienced local extension builder in Denham. Please contact us for a free, no obligation quo...

From £21,880

Last active Oct 26
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MAX CONSTRUCTION LTD

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

MAX CONSTRUCTION LTD provides a local, trusted extension...

From £22,096

Last active Oct 26
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RLC Construction

RLC Construction are here to help customers who need an Extension Builder in Denham. We offer a competitive rate to complete all your extension bui...

Flat roof extension cost in Denham

Estimates for build a flat roof extension near Denham

A flat roof extension ranges from the cheapest of £21,880 (MAX CONSTRUCTION LTD based in HA4) to the dearest of £22,464 (AV Home Improvements based in WD19), 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 Denham by posting a job with HaMuch. We'll send it to extension builders in Denham.


Estimates for common extension builder jobs in Denham;

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...