The Peter McVerry Trust has said its strategic housing target has been achieved 12 months ahead of schedule.
The national housing and homeless charity's four year strategy had set out to more than double its housing units to 450 by the end of 2020.
In a statement, CEO Pat Doyle said that while the target had been met early, the Trust would redouble its efforts to house the most vulnerable - particularly single people - in 2020.
He said: "We have a plan to add at a minimum of 100 further units in 2020 and are working on a range of other opportunities that will see more empty buildings brought back to use, more town centre retail spaces converted to homes, more derelict buildings regenerated, and more new homes built for people who need them."
The charity has lodged a planning application for 12 apartments on Shaw Street in Dublin 2 and also has active projects in Dublin 2, 4, 6 and 8.
Peter McVerry Trust housing projects are funded through a combination of funding from the Department of Housing and Planning and charitable donors.