A 21-year-old could be in a lot of trouble after a fire started reportedly at his dad's boss's house.

A fire destroyed a multi-million-dollar waterfront house in Pickering on Saturday.

The 21-year-old was house sitting at the time.

Officials say the blaze started in the barbeque, and the sitter was the only one home at the time.

The blaze caused $1-million in damages.