The ministry was also again unable to answer the Otago Daily Times request to publicly commit to returning court services to the historic courthouse, saying it needed up to 20 working days to respond.
Since the historic courthouse was pronounced an earthquake risk, no plans for strengthening work have been publicly released, and no strengthening work has occurred.
A ministry spokesman said it was continuing to build a business case ''to explore our options for returning services to the Stuart St courthouse'', calling the process required to strengthen heritage buildings ''complex''.
''We will be paying rates, [the] amount of which is set out on the DCC website.
''Just because a building is being vacated because it poses a risk of collapse in a strong earthquake, it does not mean we are exempt from paying rates.''
Dunedin barrister Anne Stevens said it was hard to believe the ministry was serious about returning court services to the building.
''It is hard to accept that that is a genuine statement, when no work has occurred.
''It's hard not to be a little cynical that there is some prejudice against the building, because it is historic.
''I suspect they think it will cost too much as an ongoing concern.''
Mrs Stevens said the city's legal community was confused at decision-making leading to the building's closure without any plan for remedial work.
''We just think there's some muppet up there making bizarre decisions. Who is this person? It defies reason.''
She said the idea the building may be expensive to run or maintain needed to be contrasted with the cost of losing ''a dignified seat of justice and a very functional courthouse''.
''That building has the stature and the standing to administer justice. This box [High St] doesn't.''
The community would suffer, she said, as the historic courthouse was as important as the railway station, part of Dunedin's heart, and ''giving this city a depth and character that makes it a special place''.
The ministry said it would take an extra 10 working days to furnish information in response to an ODT request lodged on May 1. A response will be provided on June 12.
The ODT has asked for relevant ministry briefing papers and reports to help explain a lack of progress.