TOP SIPTU officials such as Jack O'Connor will have to take public transport to work after the redevelopment of Liberty Hall.
The landmark building, Ireland's first skyscraper, is to be knocked down and replaced with a 20-storey tower.
However, a car park is not included in the plans for the new structure, which is expected to take three years to complete.
Liberty Hall currently has 18 parking space, which are used by union staff, including senior executives.
While the plans for the new building were unveiled last year, an application has yet to be lodged with the council.
City councillors were given a presentation on the designs by SIPTU general secretary Joe O'Flynn this week.
Independent councillor Marie Metcalfe said everyone was "very impressed" with the proposals.
She said councillors were told the demolition works are not expected to affect traffic flow along the north quays and across Butt Bridge.
"I was very impressed [with the plans], I have to say. Everybody was impressed -- no big issues were raised," Cllr Metcalfe added.
The planning application is not expected to be lodged for weeks.