Plans have been lodged for 977 new homes on the site of Dublin's Central Mental Hospital as part of the Land Development Agency's (LDA) biggest ever development.
The LDA was set up to develop affordable housing on State-owned land and has a target to deliver 5,000 new homes by 2026 and up to 20,000 overall.
In its plan for Dundrum, 48% of the 977 units are studio or one-bed, with a further 37% two-bed.
There are 131 three-beds and 13 four-beds in the purposed development, which will be 80% cost rental and 20% social.
The vast majority will be apartments in blocks up to seven-storeys high, as well as 17 duplexes and 20 houses.
In a statement, the LDA said that 30% of the 9.6 hectares to be developed will be green space, including play areas and an enhancement of the existing walled garden.
The site is 450 metres from a LUAS station and there will be a "strong emphasis" on minimising car use and prioritising pedestrians, cyclists and public transport, the statement added.
The site became available when the HSE decided to move operations to a new purpose-built facility in Portrane, North Dublin.
The remaining area of the 11.3-hectare site consists of the hospital building, which dates back to 1850 and which will be redeveloped at a later date, providing up to 100 more housing units.
The total number of houses in the current plan will be 1,077, down from the 1,259 originally envisaged. The maximum height of the apartment blocks have been reduced from 11 to seven storeys.
John Coleman CEO of the LDA said: "We have looked to balance the need to optimise use of this landmark state-owned site to deliver much needed housing with the desire to integrate into an existing neighbourhood."
The planning application has been submitted to An Bord Pleanála under the fast-track Strategic Housing Development scheme.
