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

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From £22,000

Last active Nov 26
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NA Brickwork

Experienced extension builder ready to quote for your work. NA Brickwork is the best extension builder in Swanley. No obligation free quotes and ma...

From £22,112

Last active Nov 26
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Master Builders

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

Master Builders provides a local, trusted extension buil...

From £21,968

Last active Nov 26
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UNIVERSAL CONSTRUCTION

Relax... you have found a reliable extension builder in Swanley. UNIVERSAL CONSTRUCTION is a friendly and reliable company based in Swanley who con...

From £22,216

Last active Nov 26
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POVERSET BUILDING COMPANY

Curtis Archer

Relax... you have found a reliable extension builder in Swanley. POVERSET BUILDING COMPANY is a friendly and reliable company based in Swanley who ...

From £22,376

Last active Oct 26
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Saintflexs

Julian Cafun

Need an Extension Builder in Swanley? Saintflexs has been helping local clients (10 mile radius) with their extension buildering jobs for many yea...

From £22,184

Last active Oct 26
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Our Builders Ltd

Max Dixon

We are a construction company specialising in all aspects of building works, loft construction Extension complete home renovation, structural ...

From £22,352

Last active Oct 26
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R Tredget & Son

R Tredget & Son are here to help customers who need an Extension Builder in Swanley. We offer a competitive rate to complete all your extension bui...

From £22,616

Last active Oct 26
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HOUSE BUILDING SERVICES LIMITED

Tommy House

HOUSE BUILDING SERVICES LIMITED is a trusted extension builder serving customers in Swanley and the surrounding area. Contact us to today to get a ...

From £22,152

Last active Oct 26
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J&S WALLINGTON LIMITED

We provide our clients with excellent service and quality. Whether you are looking to extend or upgrade, our professional team has the skills and e...

From £22,128

Last active Oct 26
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JPRMS Ltd

Relax... you have found a reliable extension builder in Swanley. JPRMS Ltd is a friendly and reliable company based in Swanley who consider no job ...

Flat roof extension cost in Swanley

Estimates for build a flat roof extension near Swanley

A flat roof extension ranges from the cheapest of £21,968 (UNIVERSAL CONSTRUCTION based in BR8) to the dearest of £22,616 (HOUSE BUILDING SERVICES LIMITED based in DA16), 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 Swanley by posting a job with HaMuch. We'll send it to extension builders in Swanley.


Estimates for common extension builder jobs in Swanley;

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...