KiwiRail does not believe Wellington Railway Station poses any immediate safety threat, despite the possibility it needs earthquake strengthening.
KiwiRail says engineering advice shows the station is expected to be above minimum threshold of the new building standard, meaning it is not an earthquake-prone building.
But chief executive Jim Quinn said engineers had identified areas which could require strengthening to make them safer, including the main atrium, facade and internal stairs.
However, customers should not be concerned about using the building, Mr Quinn said.
"We know there's been a few earthquakes in Wellington recently. The building has come through those fine.
"So we know it's okay to a level ... it would depend how serious an event it was," he said.
The final report on the building and any work which needed to be done was expected to be done by late November.
Wellington Railway Station was opened on 19 June 1937. Construction began in January 1934 and a foundation stone was laid on 17 December 1934.