Knowledgebase: DCLG Guide to DECs
Validity period of DECs
Posted by Mike Gordon on 22 July 2015 12:37 PM

Where the building has a total useful floor area of more than 1,000m², the DEC is valid for 12 months. The accompanying advisory report is valid for seven years. Where the building has a total useful floor area of between 500m² and 1000m², the DEC and advisory report are valid for 10 years.