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Greater Manchester's trusted builders for over two decades

Get your project off to the best start by employing a company you can rely on. Contact DEC-Approved Ltd for superior quality building work at prices that don't break the bank.

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A team you can rely on

Thinking about improving your domestic or commercial property? Need advice or guidance with an extension or complete renovation? DEC-Approved Ltd has the expertise and know-how to help. 

We've been building our enviable reputation across Ashton-Under-Lyne since our formation in 2000. In that time, we've assembled a team of some of the best builders and tradespeople in the region and attained CHAS certification, SafeContractor approval, SafePQQ verification and Constructionline registration, so you can choose us with confidence. Claim your free, no obligation quote by contacting our friendly team using the methods below.

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Q: ‘Do I need Planning Permission for an extension?’

A: Dec-Approved can confirm that, for smaller house extensions, permitted development rights mean you may not have to apply for Planning Permission. This depends on the size of the existing property, the size of the extension, the type of windows you would like, and any prior additions made since the property was first built. For further info contact your local Council Office Planning department.

Q: ‘What size extension can I build without Planning Permission?’

A: Dec-Approved can confirm that Permitted Development Rights mean you can extend to eight metres for detached houses, and six metres for all other types of houses. Extensions over four metres need to be notified to your neighbours who have the right to object to the size requested.

Contact us

Address: 34 Blandford Street, Ashton-under-Lyne OL6 7DW, UK

DEC-APPROVED LIMITED, registered as a limited company in England and Wales under company number: 04234651. 

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