Yes, typically if someone has an accident that results in them damaging property, such as your workplace building, it would covered by their auto insurance.

Property damage liability insurance covers a policyholder if their car damages someone else's property. Usually it is a car, but it could be a fence, a house or any other property damaged in an accident. It also provides the motorist with legal defense if another party files a lawsuit against them.

If though the stroke was due to a pre-existing medical condition that the driver did not inform his insurance company about there could be a possibility that his insurance company would not cover the claim for the damages to the building.