Hello, it's the exact same in English.
Mes parents viennent de vendre leur maison.
= My parents HAVE just sold their house. (present)
Quand je suis sortie de chez moi, je venais de finir mes devoirs.
= When I went out, I HAD just finished my homework. (past)
"Je suis sortie chez moi" doesn't make sense, it's like saying "I went out home" in English.
We always use the verb 'sortir' with the preposition 'de', meaning 'from/of'. You get out OF your house.