A further 63 properties in the Port Hills in southeast Christchurch have been red-stickered because of Monday's quake aftershocks.
Geotechnical experts have been reassessing the dangers after the earthquakes caused significant extra rockfall and land movement.
The worst-affected areas are around Sumner, including Scarborough and Whitewash Head.
Christchurch City Council regulations manager Peter Mitchell says engineers will continue to issue red placards where properties are judged not safe to enter because of the threat of further rockfall or land movement.
The council is also asking people using the Port Hills to stay away from cliff edges and fenced areas.
It says early assessments indicate that remediation work carried out since 22 February was successful in reducing the risk to homes during Monday's earthquakes.