Plans to re-zone 20 Dublin industrial sites to provide around 4,000 homes are to go out to public consultation.

The 55 hectares of land are part of a larger plan to use former industrial estates for residential development.

When larger sites in Finglas, Glasnevin, Coolock and Naas Road are ready for development, the scheme could provide up to 20,000 homes in 20 years time, according to council officials.

A monthly meeting of councillors heard that 20 smaller sites will be earmarked for re-zoning first and are situated in Finglas, Santry, Artane, Harmonstown, Ballyfermot, Inchicore, Fairview, Kilmainham, the Liberties, Drimnagh, Dolphin's Barn, East Wall, Crumlin, Harold’s Cross as well as lands near Connolly and Heuston Stations.

The individual sites will now go for local public consultation.

Meanwhile, councillors voted to extend an increase in development levies to residential as well as commercial and industrial construction.

Council officials wanted to limit the increase to commercial and industrial construction because of the housing shortage but a Green Party amendment was passed to include residential.

The 6.6% increase is indexed to construction tender prices compiled by Society of Chartered Accountants and is paid by developers as a contribution towards the cost of providing infrastructure.

Assistant chief executive Richard Shakespeare said the increase would mean an extra development contribution of up to €600 for an average two-bedroom house.

The increase will come into effect in January.