Later in the movie, Julia is rehearsing her "Hello, my name is Julia Gulia" in the mirror in her room. Robbie Hart comes strolling up on the street below to confess his love to Julia but becomes discouraged when he sees her happy and smiling through the window. Julia's house is over in the city of Sierra Madre (not too far from the filming spot for Dude Where's My Car).
Robbie Hart's sister's house is located at:
1075 E Topeka Street
Julia's House is located at:
41 Sierra Place
Sierra Madre, CA