I have never heard of privacy laws in regards to property tax. Property tax is of public record, just like arrest records. If you allowed privacy on public records, it defeats the entire purpose of trying to keep everyone honest. But it looks like California may be the only state that has decided to make themselves even more impossible to work with. See the reference below.Although public records are records of public business, they are not necessarily available without restriction, although Freedom of Information legislation (FOI) that has been gradually introduced in many jurisdictions since the 1960s has made access easier. Each government has policies and regulations that govern the availability of information contained in public records. A common restriction is that data about a person is not normally available to others; for example, the California Public Records Act (PRA) states that “except for certain explicit exceptions, personal information maintained about an individual may not be disclosed without the person’s consent”.In the United Kingdom cabinet papers were subject to the thirty year rule: until the introduction of FOI legislation, cabinet papers were not available for thirty years; some information could be withheld for longer. As of 2011 the rule still applies to some information, such as minutes of cabinet meetings.Some companies provide access, for a fee, to many public records available on the Internet. Many of them specialize in particular types of information, while some offer access to different types of record, typically to professionals in various fields. Some companies sell software with a promise of unlimited access to public records, but may provide nothing more than basic information on how to access already available and generally free public websites.