The temporary road closure on Old Laxey Hill has been extended until next month.
The road has been closed while CCJ Group Ltd has been demolishing to a clifftop property. That closure will now last until December 12.
A spokesperson for the Department of Infrastructure said: “CCJ has recently reported to the department, during the course of the works, structural engineers have advised that the wall retaining the edge of the highway now needs to be strengthened and supported before traffic is allowed to run past it once more.
“The department has agreed to keep the road closed to allow this work to take place.”
They added: “The planned work is being done as part of the current demolition project and is not being undertaken at public expense.”
Cliffmount was one of two buildings to be evacuated after a landslide in 2023.
