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

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From £22,264

Last active Mar 26
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Trad Roofing

Experienced extension builder ready to quote for your work. Trad Roofing is the best extension builder in Alton. No obligation free quotes and many...

From £22,184

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RP Superstructures

RP Superstructures was formed in 2011 by principals Gerry Budd and Pat Sheehan following the successful build of Gerry’s own house, using his mul...

From £22,080

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A & J Roofing (Haslemere) Ltd

Location

Alton, GU34

Need an Extension Builder in Alton? A & J Roofing (Haslemere) Ltd has been helping local clients (20 mile radius) with their extension buildering j...

From £21,904

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Vaughan Design and Development

Vaughan Design and Development is an established extension buildering business in Alton. We come highly recommended and provide competitive quotes ...

From £22,104

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360 CONSTRUCTION SURREY LTD

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

360 CONSTRUCTION SURREY LTD provides a local, trusted ex...

From £22,832

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CANADA BUILDERS & ROOFING LTD

John Shea

Experienced extension builder ready to quote for your work. CANADA BUILDERS & ROOFING LTD is the best extension builder in Alton. No obligation fre...

From £21,976

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Design & Construction Support Ltd

Relax... you have found a reliable extension builder in Alton. Design & Construction Support Ltd is a friendly and reliable company based in Alton ...

From £22,072

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A House Builder

Alan House

Work is always carried out on time , clean & tidy

From £22,248

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REPAIR CRAFT CONSTRUCTION

REPAIR CRAFT CONSTRUCTION is a trusted extension builder serving customers in Alton and the surrounding area. Contact us to today to get a competit...

From £22,200

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RP Superstructures

Relax... you have found a reliable extension builder in Alton. RP Superstructures is a friendly and reliable company based in Alton who consider no...

Flat roof extension cost in Alton

Estimates for build a flat roof extension near Alton

A flat roof extension ranges from the cheapest of £21,904 (Vaughan Design and Development based in gu32) to the dearest of £22,832 (CANADA BUILDERS & ROOFING LTD based in GU35), 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 Alton by posting a job with HaMuch. We'll send it to extension builders in Alton.


Estimates for common extension builder jobs in Alton;

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...