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

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From £22,408

Last active Oct 26
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Jon Howard Construction Ltd

Jon Howard Construction Ltd is a trusted extension builder serving customers in Hertford and the surrounding area. Contact us to today to get a com...

From £22,456

Last active Oct 26
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Up and Out Builds Ltd

Relax... you have found a reliable extension builder in Hertford. Up and Out Builds Ltd is a friendly and reliable company based in Hertford who co...

From £22,344

Last active Oct 26
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Roberts & Co

Roberts & Co is a family run business est.2009. We specialize in Kitchen extensions and Loft conversions, and cover Hertfordshire, Essex and Greate...

From £21,968

Last active Oct 26
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A S G Developments - Herts LTD

Amarjeet Gill

Architecture and Construction all in one place. 

FREE DRAWINGS for all projects we build. 

From £22,232

Last active Oct 26
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Buyerz Trading

Buyerz Trading is an established and experienced local extension builder in Hertford. Please contact us for a free, no obligation quote and competi...

From £21,864

Last active Oct 26
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Advance Construction Solutions

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

From £22,072

Last active Oct 26
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A1 Home Care Building Maintenance

A1 Home Care Building Maintenance are here to help customers who need an Extension Builder in Hertford. We offer a competitive rate to complete all...

From £21,920

Last active Jul 26
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MA Gower

Need an Extension Builder in Hertford? MA Gower has been helping local clients (20 mile radius) with their extension buildering jobs for many years...

From £23,560

Last active Jun 26
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Flamstead Building Services Ltd

Ilir/leo Shkembi

Dear All, I’m a plumber and heating  engineer, I have  access to all other trades guys that are willing to work long hours and at the weekends ...

From £22,384

Last active Jun 26
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IMS Building Services

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 Hertford

Estimates for build a flat roof extension near Hertford

A flat roof extension ranges from the cheapest of £21,864 (Advance Construction Solutions based in EN6) to the dearest of £23,560 (Flamstead Building Services Ltd based in EN8), 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 Hertford by posting a job with HaMuch. We'll send it to extension builders in Hertford.


Estimates for common extension builder jobs in Hertford;

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...