Quoting from Peter Fritzsche’s Life and Death in the Third Reich, page 140:

In April 1939 new federal legislation withdrew the protection of rent‐control laws from Jews. Now landlords could evict their Jewish tenants if municipalities guaranteed another form of housing.

In order to isolate Jews and free up apartments, local [Fascists] contemplated “Jew houses” and other detention centers. Although most “Jew houses” were not established until the war, officials forced Detmold’s 100 Jews into six Jew houses, on Sachsentrasse 4 and 25, Paulinenstrasse 6 and 10, Hornsche Strasse 33, and Gartenstrasse 6, as early as April 1939.¹¹⁹

Alexander Karn’s Amending the Past: Europe's Holocaust Commissions and the Right to History, page 95:

On May 10, 1939, the Law on Tenancies with Jews legalized the eviction of Jewish tenants by Aryan landlords, but the commission report also notes that 44,000 apartments in Vienna had already been Aryanized prior to that time. Jews who were evicted were reassigned to new and generally inferior quarters, which they typically shared with several other families.

Later, those who had not escaped or emigrated were sent to “holding camps” before their final transit to the east. Aryanization of apartments continued until April 1945, and the commission documented a total of 59,000 expropriations in all.³⁸

(Emphasis added in both cases.)