original_query: What was the impact of the Housing Requirement Act on apartment rents in Vienna?
query: What was the impact of the Housing Requirement Act of 1919 on apartment rents in Vienna?
answer: The 1919 Housing Requirement Act, combined with low building costs and low private demand for building land, facilitated the city's extensive public housing program.  While the 1917 Tenant Protection Act froze rents at 1914 levels, making new private housing unprofitable, the 1919 act eased housing pressures and allowed for the construction of affordable public housing.