In the distance is the building where their apartment was located, a close-up of which was shown at the very beginning of each Milwaukee episode's intro,
when Laverne & Shirley sang:
♫ 1, 2, 3, 4, 5, 6, 7, 8, schlemiel, schlimazel, Hasenpfeffer Incorporated... ♫
This building (called Block A) is still located on Washington Square, on the back lot at Paramount Pictures Studios in Hollywood, California.
Although all units in this building look identical, my yellow flag-pin points to the steps of Laverne & Shirley's actual entrance.
This is NOT where any episodes were filmed; this building was ONLY used for the opening credits, and a few outside shots during certain episodes.
The actual episodes were filmed on Stage 20, at the front of Paramount Pictures Studios.
Paramount Pictures Studio 6TH July 2011 Hollywood, California Paramount Pictures Studios Back lot About 250' up the road from Laverne & Shirley's apartment building John Mark Motyer, CD