One of the properties was sitting perilously close to the edge
The results of an investigation into landslips near Cayton Bay which saw some properties demolished on safety grounds are expected within weeks.
Three properties had to be demolished because of the landslip at Knipe Point, overlooking Cayton Bay.
Scarborough Borough Council's cabinet approved a study into the cause of the landslip so "possible remedial measures" could be identified.
Now the drilling has been completed and the results are expected in April.
The Environment Agency agreed to a £126,000 grant to fund the study.
An earlier report to Scarborough Borough Council's cabinet had said 56 bungalows at Knipe Point, all valued at about £150,000, were at risk.
The A165 Filey Road was also threatened by the landslip in the longer term, councillors heard.
But any long-term solution to the problem is far from clear as officials wait for the outcome of the drilling study and whether further funding can be obtained from the Environment Agency.