Three panels at the £14.6 million bridge were vandalised in July.
But three months on they have yet to be replaced and won’t be repaired in time for Derry’s spectacular Halloween celebrations at the end of this month.
The Department for Infrastructure (DfI) said it hopes new panels will be in place before the end of November.
Sinn Féin councillor Christopher Jackson said the process appeared to lack urgency.
“I am disappointed with the time frame,” he said.
“The Peace Bridge is the first impression for many tourists to the city. The people of Derry are immensely proud of the bridge.”
A DfI spokesperson said the cost to replace the panels is “significant”.
“The department is currently seeking quotations to replace the panels broken during the latest incident.
“The manufacture and installation of these bespoke glass panels does present some difficulty, however, it is hoped that they can be replaced before the end of November.”
Cllr Jackson said he was further disappointed that the replacements would not be in place before the city’s annual Halloween celebrations.
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