This further extension impacts in the following ways:

• If an application was lodged before or on Friday 21 February 2020, the public participation phase is completed, and so a planning authority can make a decision within the extended deadline;
• If an application was lodged after that date, but before 29 March 2020, the decision cannot be made until after 9 May 2020 to ensure that the public participation element has been completed;
• If an application is lodged after 29 March 2020, it cannot be determined by the Planning Authority until after the expiration of the five week period for public consultation, which now commences on 10 May 2020, so subject to the date on which an application is submitted, the earliest a decision could be made would be Monday 15 June 2020.
• The extended time will also apply to planning appeals, which An Bord Pleanála will continue to receive by post.

The Department continues to recommend to planning authorities that public consultation and council meeting activity on all Plans be deferred until after the extension period, which will now end on 9 May 2020.

Source: https://www.housing.gov.ie/planning/covid-19-coronavirus/public-participation-period-planning-system-extended-further-19-days