Re: Re: When can you carry out Exempted Dev? Home › Forums › Ireland › When can you carry out Exempted Dev? › Re: Re: When can you carry out Exempted Dev? October 10, 2007 at 2:25 pm #792350 AnonymousInactive ‘Substantial Completion’ is deemed to be wallplate level from the point of view of applying for an extension of the duration of a planning premission…. dont know if this helps any, but….. Latest News