The top level of the Clonbern Road carpark in Remuera has been closed until further notice.
Following routine maintenance inspections some months ago there had been weight restrictions placed on vehicles on the top level.
Further tests will be undertaken tomorrow and until the results are known, AT has closed the upper deck as a precaution.
There are no immediate safety concerns, the closure is being done as a precautionary measure.
The top deck has 70 spaces and the lower deck, which is still open has 129 spaces.
AT will be meeting with nearby businesses today to work on a plan for other parking options in the vicinity, this may include removing or altering parking time restrictions.