The tender process is underway for one of the largest social and affordable housing schemes in the country at Shanganagh Castle in Shankill, Co Dublin.
The Land Development Agency (LDA), in partnership with Dún Laoghaire Rathdown County Council will deliver 597 homes.
The tender process is expected to complete later this year with construction scheduled to start in 2022.
The LDA said the first homes are due to be completed early in 2023.
Shanganagh is the first project to be advanced by the LDA in partnership with Dún Laoghaire Rathdown County Council.
All of the 597 homes will be social and affordable.
Two thirds are allocated to affordable homes for both rent and purchase, and a third to social housing.
The LDA said the affordable purchase homes will be provided in accordance with the Government's Affordable Housing Bill.
Phelim O’Neill, Head of Property at the Land Development Agency said the LDA is happy to get the green light from Government to move forward with the tender process for Shanganagh Castle.
"This is another important milestone in the process of delivering nearly 600 affordable and social homes in Dún Laoghaire Rathdown," he said.
