Fire damaged a two-storey house on Victoria Street in Charlottetown early Sunday morning.
The Charlottetown Fire Department responded after the blaze was reported at 3 a.m.
There were no injuries but four men have been displaced who rented the house.
Two men were helped by the Canadian Red Cross with emergency lodging and necessities. Another man is staying with relatives and the other was away on business.
The fire is being investigated.