Location #1: School building
At St. Sylvester, Biedersteiner Straße, Munich, Germany
Location #2: Bill’s Candy Shop
On Lilienstraße, Munich, Germany
Note from the Webmaster: The building, as it appears in the movie, is now gone.
Location #3: Willy Wonka’s Chocolate Factory
At Stadtwerke München GmbH, Emmy-Noether-Straße, Munich, Germany
Location #4: Charlie’s house
On Quellenstraße, Munich, Germany
Is Bill’s Candy shop now the design pool products showroom?
https://www.google.com/maps/@48.1290107,11.5858369,3a,75y,120.12h,67.67t/data=!3m6!1e1!3m4!1sAF1QipMGdRTP7oafZJSfXqdUoYTbNZUW0rgJ2Ar_ID-T!2e10!7i13312!8i6656?hl=en-US
I think it’s at #58 Lilienstrasse.
https://www.google.com/maps/@48.1278383,11.5847236,3a,75y,245.2h,86.66t/data=!3m6!1e1!3m4!1sWK12P6Ax0EK7o-ev3XjFrg!2e0!7i13312!8i6656?hl=en-US
If you’re on street view and facing south you can see the church spire in the background that corresponds with the frame grab. Also the lot/empty space just to the left of the candy shop is consistent.