The pet shelter of the present invention is adapted to be mounted over the basement window opening of a house. The shelter has a double swinging door which can swing inwardly and outwardly. A locking bar pivots from a vertical position to a horizontal position in retentive engagement with the swinging door. A flexible cord is attached to the lock bar and extends through a hold in the house wall to the interior of the house where it can be manipulated to raise and lower the locking bar for locking and unlocking the swinging door.