The building in question is part of the local authority redevelopment plan for Ballymun (it's not actually in Santry at all). The building was lauded by the authority as one of the signiture constructions in the development.
As for IAA/DAA objections, the planning process in Ireland, and around Dublin in particular, is so corrupt that any objections would most likely fall on deaf ears with the aid of a brown evelope or two* (look at the recent Bewleys 7 storey hotel built just to the left of the 28 apprach and the Cargobridge development on the edge of the airport to the right of 28).
JAS
*For proof of this; currently the Taoiseach (Prime Minister) is appearing on front of a Tribunal of Inquiry in Dublin investigation just that topic. Mr. Ahern is the latest in a line of local and national politicians beign quizzed (and dodging giving any answers) regarding certain funding he received over the years.