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

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From £22,512

Rates verified Oct 26
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Mandala Building Services

Mandala Building Services is a family-owned design and build maintenance company, encompassing everything from residential refurbishment to large-s...

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 Radlett. Please contact us for a free, no obligation quote and c...

From £22,560

Last active Oct 26
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Rafix Building

Rafal Szczepanski

Our homes need to be regularly maintained and from time to time they need to be rejuvenated, modernised and enhanced. When it comes to building wor...

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 Radlett. Please contact us for a free, no obligation quote and comp...

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 Radlett. We offer a competitive rate to complete all your extension bu...

From £22,368

Last active Oct 26
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Building Service and Support Ltd

Relax... you have found a reliable extension builder in Radlett. Building Service and Support Ltd is a friendly and reliable company based in Radle...

From £22,440

Last active Oct 26
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COMPLETE CIVIL ENGINEERING

Ciaran Feeney

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

COMPLETE CIVIL ENGINEERING provides a local, trusted ext...

From £22,072

Last active Oct 26
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Chrysalis

Chrysalis are here to help customers who need an Extension Builder in Radlett. We offer a competitive rate to complete all your extension builderin...

From £22,160

Last active Oct 26
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PERFORMA CONSTRUCTION LIMITED

Relax... you have found a reliable extension builder in Radlett. PERFORMA CONSTRUCTION LIMITED is a friendly and reliable company based in Radlett ...

Flat roof extension cost in Radlett

Estimates for build a flat roof extension near Radlett

A flat roof extension ranges from the cheapest of £22,072 (Chrysalis based in HA3) to the dearest of £22,560 (Rafix Building based in EN4), 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 Radlett by posting a job with HaMuch. We'll send it to extension builders in Radlett.


Estimates for common extension builder jobs in Radlett;

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...