According to the San Francisco Tenants Union, the maximum allowable annual rent increase is 1.9 percent. Follingstad was served with a 415 percent rent increase, even though the Bernal Heights home that she occupies would appear to be protected by the city's rent-control laws. Per the Housing Rights Committee of San Francisco, a tenants'-rights organization, rent control applies to most any building built before June 1979, including the 1924 house in question.