The warning comes as Aberdeenshire council continues to monitor the cliffs around the village of Pennan following a further landslip.
Debris from the Pennan landslip this week landed perilously close to homes.
No-one was injured, but council bosses urged residents to avoid the area because of further risks.
They also warned that homeowners may have to pay for repairs.
A council spokesman said: "The slip is not on land owned by the council."