The new campus at Grangegorman, which is the largest investment in Higher Education in Ireland, brings together many activities in one vibrant, cutting-edge campus.

In 2014, the Dublin Institute of Technology (DIT), Institute of Technology, Blanchardstown (ITB) and Institute of Technology, Tallaght (ITT) jointly entered into a formal process to seek to merge into a university. At the time, following the Institutes of Technology Act 2006, there were fourteen IT's in Ireland, and a political appetite emerged to amalgamate several to form a more advanced third-level institution, known as a technological university, similar to that of Delft and other technological universities in Europe.

The Dublin bid, proposed by the three institutes, eventually coalesced into a move, in 2014, to seek designation as a technological university under the project title "Technological University for Dublin Alliance" / "TU4Dublin". A final application was submitted in April 2018, following the enactment of the Technological Universities Act 2018.

The formation of the Technological University of Dublin was approved in July 2018, and the university was formally established on 1 January 2019, on which date the preceding institutions were dissolved.

In April 2019, TU Dublin sold its Kevin Street campus to York Capital and Westridge Real Estate for €140 million. The Kevin Street campus was vacated in March 2021 and demolition works began on the site in April 2021. I studies Electronics at Kevin Street and I totally disliked the building.

In March 2020, TU Dublin put the Aungier Street campus up for sale, with the campus scheduled to close in 2023, after which students and staff will relocate to the Grangegorman Campus.