Plans have been lodged for more than 1,400 homes in Dublin and Wicklow.
They have been lodged with An Bord Pleanála, which is due to make a decision on whether to grant permission in 16 weeks.
There are plans for 759 homes in Kilbride, Arklow, Wicklow - which involve 515 houses and 244 apartments.
There are also plans for 232 build-to-rent apartments in the Old Dublin Road in Stillorgan, Co Dublin.
In Parkgate Street in Dublin city, there are plans for 438 build-to-rent apartments which include 28 shared-living units.
All three applications have been lodged with An Bord Pleanála, under the new fast-track mechanism for large developments.
Reporting by Eoghan Murphy