Permission has been given by An Bord Pleanála for the next phase of Dublin Port's €320m masterplan to proceed, subject to conditions.
The project, reports RTE, includes the development of a new roll-on roll-off (RoRo) jetty, the lengthening of an existing river berth and the redevelopment of a deep-water container berth.
A new public "heritage zone" at the east end of the port with a structure that will have a viewing deck and a small performance space below is also included in the plan.
"The proposed development in the operational phase will give rise to impacts which are positive," the planning board said in its decision.
"It will facilitate the completion of a single unified Ro-Ro terminal and enhanced Lo-Lo facilities facilitating the removal of capacity constraints within Dublin Port, thereby enabling projected economic growth through increased capacity and improved port infrastructure to facilitate larger vessels."
However, the Docklands Business Forum said the decision "beggars belief".
It said it would consolidate the port's monopoly on the island, marginalising regional ports in the process.
It claimed the decision ignores the reality of Brexit and will greatly damage Ireland's most successful urban regeneration.
The forum also thinks the development will put a strain on local infrastructure adversely impacting the lives of those living and working in Docklands.
The MP2 Project development represents the second stage of three contained in the port's Masterplan 2040.
For further reading on the port's next phase of development click here.