The Dublin landmark building has been designated as a museum and a focal point for historical items relating to Joyce. The tower was closed for renovation in September last year and is expected to reopen this spring – but there is no confirmed date.
However, a new consultant report has identified that the seaside tower is unsuitable for storing rare material – including a first edition of Ulysses.
The report was compiled by British consultant Robert Taylor and outlined the damp conditions of the building.
Dun Laoghaire Rathdown Co Co said that it commissioned the report to identify the best way to manage the facility.
One of the world's most famous literary landmarks received a complete makeover worth €500,000.
Dun Laoghaire Rathdown County Council agreed to take control of the museum, based in the Sandycove Martello tower, after negotiating a €300,000 grant from Failte Ireland.
The council is also planning €208,000 from its own resources, aimed at transforming the Joyce centre into a main tourist hub.
The centre is of particular significance to Joyceans as it features in Ulysses.
The current museum at the tower contains letters, photographs and personal possessions belonging to Joyce as well as rare editions of his work.
However, the council may be forced to make a decision to house some of the more precious material elsewhere after the consultant's report.