Yellow placard properties can be entered temporarily and residents may or may not be able to stay overnight on a case-by-case basis.
Some of those properties may require a supervised entry by an authorised person.
White placard properties can be re-occupied with caution and may have no placard, or a white dot on or around the entryway.
The number of evacuated properties in the Nelson and Tasman districts has been officially confirmed at 483 following data consolidation.
By 7am on Tuesday, the initial round of inspections had been completed.
At least 15 properties have been assessed as red, 108 were given a yellow placard and 339 were assessed as white.
Nelson Tasman Emergency Management Group said these numbers would change following reinspections, and as more people registered with Civil Defence that their properties had been affected.
The group estimated between 300 and 350 properties had been affected by slips.
Residents unsure about their property assessment or who find damage after returning home should contact Nelson City Council or Tasman District Council