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

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From £22,128

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Trevillion Property Services Ltd

Stephen Trevillion

Member since October 2026

Minor and major building works

From £21,712

Last active Oct 26
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PLATINUM CONSTRUCTION

Gary Ede

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

PLATINUM CONSTRUCTION provides a local, trusted extensio...

From £21,712

Last active Oct 26
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Kiwi Construction

Patrick Rule

Trading since 1997 kitchens,bathrooms lofts patios roof work and much more

From £21,480

Last active Sep 26
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Donovan Construction

Matthew Donovan

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

Donovan Construction provides a local, trusted extensio...

From £22,424

Last active Sep 26
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JAVA CONSTRUCTION LTD

Luis Escrig

Java construction 

provide a complete building service and design

we also provide building maitanance 

w...

From £21,768

Last active Sep 26
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NCN Building & Maintenance Ltd

Need an Extension Builder in Plymstock? NCN Building & Maintenance Ltd has been helping local clients (20 mile radius) with their extension builder...

From £22,016

Last active Aug 26
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Bob Jones Installations

Rob Jones

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

From £22,112

Last active Jul 26
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GD ANDREW BUILDING CONTRACTORS

Location

Plymstock, PL9

Relax... you have found a reliable extension builder in Plymstock. GD ANDREW BUILDING CONTRACTORS is a friendly and reliable company based in Plyms...

From £21,880

Last active Jul 26
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M D C Building Services

Relax... you have found a reliable extension builder in Plymstock. M D C Building Services is a friendly and reliable company based in Plymstock wh...

From £22,024

Last active May 26
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PREMO CONSTRUCTION

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 Plymstock

Estimates for build a flat roof extension near Plymstock

A flat roof extension ranges from the cheapest of £21,480 (Donovan Construction based in PL6) to the dearest of £22,424 (JAVA CONSTRUCTION LTD based in PL7), 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 Plymstock by posting a job with HaMuch. We'll send it to extension builders in Plymstock.


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Estimates for common extension builder jobs in Plymstock;

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...