Janeway's house was a house that Kathryn Janeway lived in on Earth with her Irish Setter Mollie in 2371.
After being assigned as captain of the USS Voyager, Janeway's mission took her to Deep Space 9 where she contacted her fiancé Mark Johnson, who was dogsitting during her mission. Janeway asked Johnson to stop by her house to pick up Mollie's doggy bed so she would be more comfortable, though he assured her he already had. (VOY: "Caretaker")
This house was only mentioned in dialogue.