IntroductionThe Planning and Environment Court is a specialised division of the Irish High Court designed to provide efficient and proportionate case management of legal actions, judicial reviews, and disputes related to planning and environmental law.The Planning and Environmental Court was established with effect from 11 December 2023 by Practice Direction HC124. PD HC137 took effect on 13 April 2026 and was amended with effect from 1 August 2026. The purpose of this Practice Note is to summarise the rules governing practice and procedure in this specialised list.For an overview of the civil courts in Ireland and the principal features of each level of civil court, see Practice Note: Ireland—Civil courts structure.Applicable legislation and rules of courtThe governing legislation of planning and environmental cases, the Planning and Development Act 2024 (Ireland) (PDA 2024 (IRL)) has been enacted and is being implemented in a staged manner. This has resulted in significant planning reform that the Planning and Environmental Court has had to adapt to accommodate. The