Chez means "at the home of" or "at the shop of", and it takes a PERSON, not a place: chez moi (at my place), chez Marie, chez le boulanger. With the name of a place you use à or dans instead: à la boulangerie.
Examples
- Je suis chez moi ce soir.
- I'm at home tonight.
- On dîne chez mes parents.
- We're having dinner at my parents'.
- Je vais chez le coiffeur.
- I'm going to the hairdresser's.
The mistake to avoid
Chez never takes a building: "chez la boulangerie" is wrong - say chez le boulanger or à la boulangerie.
Where this fits in
Home & neighbourhood, French A1: Describe your home and its rooms, say where things are, and talk about the places near where you live.