It is relevant to note that, under section 94 of the Planning and Development Act 2000 as amended, each planning authority must include a housing strategy in any development plan it makes to ensure that the proper planning and sustainable development of the relevant area provides for the housing of the existing and future population of the area in the manner set out in the strategy.
Specifically, under section 94(3), the strategy must take into account the need to “ensure that housing is available for persons who have different levels of income” as well as the need to “counteract undue segregation in housing between persons of different social backgrounds.”
Beyond this issue, I would be happy to provide further information if the Deputy could advise as to what aspect of planning law or practice he may have in mind. The term ‘gentrification’ is not referenced in current planning law or practice.