The plan includes four stops and a park and ride facility.
Transport Infrastructure Ireland says the proposed Luas Finglas project will involve extending the northern part of the green line from its current terminus in Broombridge to Charlestown.
The new track will be around 4 kilometres long, with 4 news stops, two main bridges and a new park and ride facility. While the Broombridge depot would also be extended.
TII has published a tender for a survey of the landscape to be carried out.
Former Fine Gael TD Noel Rock has long campaigned for the extension - dubbed 'FingLUAS'.
He says it would connect communities in Charlestown and Meakstown to the City Centre in as little as 15 minutes.
A public consultation is expected to be announced in the coming weeks.
There are also plans to expand trams to Lucan, Poolbeg and Bray