Said Christchurch City Council infrastructure, planning and regulatory services general manager Jane Davis: "We are currently seeking legal advice on the process going forward."
The most recent bill was due to be paid in April and the city council may seek payment through the district court jurisdiction.
City councillor Jake McLennan was disappointed the bills had not been settled.
"They (the coalition) have been quiet and that’s a good thing for sure, but those costs were still incurred. I’ll be making some inquiries.”