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

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From £21,568

Last active May 26
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BRIARWOOD BUILDING CONTRS LTD

BRIARWOOD BUILDING CONTRS LTD is an established extension buildering business in Grantham. We come highly recommended and provide competitive quote...

From £21,272

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LG Soffits & Fascias

Location

Grantham, NG31

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

From £21,488

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The Glass Box

The Glass Box is a trusted extension builder serving customers in Grantham and the surrounding area. Contact us to today to get a competitive quote...

Flat roof extension cost in Grantham

Estimates for build a flat roof extension near Grantham

A flat roof extension ranges from the cheapest of £21,272 (LG Soffits & Fascias based in NG31) to the dearest of £21,568 (BRIARWOOD BUILDING CONTRS LTD based in NG32), 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 Grantham by posting a job with HaMuch. We'll send it to extension builders in Grantham.


Estimates for common extension builder jobs in Grantham;

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.

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