The Wellington regional council building and Education House in New Plymouth have been identified as having similar design flaws as the CTV building that collapsed during the Canterbury earthquakes.
The buildings, which have been vacated, have non-ductile or inflexible columns and are also earthquake prone.
The collapse of the CTV building, which killed 115 people, triggered checks on hundreds of buildings with the same types of columns.
However, Wellington regional council says it's actually a weakness in the stairwell that forced staff to vacate its 10 storey building after the first Seddon quake in July.
New Plymouth district council says the Crown-owned Education House is similar to, but not the same as, the CTV building.