Orange-zoned residents can still expect a decision next month on whether they can remain in their properties, despite a continuing surge of aftershocks causing further damage, says a spokesman.
Christchurch has been rocked by earthquakes over the past few days, with 41 in the Canterbury region recorded in one 24-hour period.
Canterbury Earthquake Recovery Authority chief executive Roger Sutton said although the latest series of quakes have caused damage, engineers were working around the clock and he didn't see any significant delays.
He told Radio New Zealand the team was still working towards a decision in February to say whether the 900 residents in the orange zone could stay in their properties.
"We've got this balance between getting them a decision which we can get reasonably quickly but also making a decsion which we know is right for the longer term, because if people do move out of these areas it's going to be very traumatic and difficult for them as well.