While Section 146 of the Planning and Development Acts 2000-2010 provides that the files on appeals can be inspected by members of the public three days after the appeals are determined by the Board, in practice the Board circulates substantive submissions received to interested parties for their information during the course of an appeal.
This is done where, in accordance with Section 131 of the Act, An Bord Pleanála forms the opinion that, having regard to the particular circumstances of an appeal (e.g. where it considers that a new matter has been raised), it may circulate the submission, inviting observations from the relevant parties.
I have no plans to instruct An Bord Pleanála to make submissions publicly available through its website during the appeals process.