Auckland Mayor Len Brown is signing up ratepayers to pay for a cruise ship terminal which has risen in cost from $6 million in June to $28.7 million.
In June, Mr Brown said converting Shed 10 on Queens Wharf into a terminal would be nothing extravagant, costing $6 million, but now a further $22.7 million is being put up so architects can improve the design.
Ratepayers have already paid $4 million to do up the century-old Shed 10, which was included in Mr Brown's $6 million costings in June.
The council's waterfront agency - with the blessing of Mr Brown - is seeking expressions of interests from architects to design the terminal before the public has a say on funding for the project in the mayor's long-term budget.
The budget contains double-digit rates and water bill increases for thousands of Auckland households as a consequence of creating a single rating system from next year.