A planning application has been lodged with Fingal County Council to extend Blanchardstown Centre's Central Mall area.
The application was lodged by Multi Corporation, Blackstone's pan European retail platform that has managed Blanchardstown Centre since its acquisition by Blackstone last August.
The company said that if planning is granted, it will result in a €15m investment in the centre and the creation of 150 permanent positions.
A further 125 jobs will be created during the construction phase of the project if it receives planning permission.
Blanchardstown Centre currently employs 5,500 people.
The planning application involves a 60,000 sq ft development that will create several new large retail units on both the lower and upper Central Mall levels.
"This is the first of a number of planned investments in the Blanchardstown Centre that will enhance the shopping experience for all of our customers and create the large well-configured units that our retailers require to grow their businesses," commented Dominic Deeny, Managing Director of Multi Ireland.