Wellington city residents could face a 15 percent rise in regional rates due to higher property values.
The regional council's annual plan will be discussed at a meeting this week.
In it, the council offers three options for splitting the required rates across the region, to cover an average increase of 5.9 percent.
In the worst case scenario Wellington city residents would pay 15.2 percent, or $80, more a year.
Another option would mean an increase of 12.7 percent, and a third an increase of 7.9 percent.
The council report says Wellington city properties went up 44 percent in value in the last valuation, and residential properties increased more than those in the CBD and businesses.
That is partly due to demolition or damage to commercial buildings as a result of the Kaikōura earthquake.