If they have a mortgage the property taxes are probably paid out of an escrow account along with the homeowners insurance. By the way in California we have proposition 13
Proposition 13, adopted by California voters in 1978, mandates a property tax rate of one percent, requires that properties be assessed at market value at the time of sale, and allows assessments to rise by no more than 2 percent per year until the next sale. This means that as long as property values increase by more than 2 percent per year, homeowners gain from remaining in the same house because their taxes are lower than they would be on a different house of the same value. Proposition 13 thus gives rise to a lock-in effect for owner-occupiers that strengthens over time. It also affects the rental market, both directly because it applies to landlords and indirectly because it reduces the turnover of owner-occupied homes.
As a result of Proposition 13, there are obvious distortions in the real estate marketplace. For example, in 2003 financier Warren Buffett announced that he pays property taxes of $14,410, or 2.9 percent, on his $500,000 home in Omaha, Nebraska, but pays only $2,264, or 0.056 percent, on his $4 million home in California. Although Buffet is known as an astute investor, the low property taxes on his California home are not attributable to his investment prowess, but rather to Proposition 13.
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They 
that blood type!!
