In California, there is a law called Proposition 13. With Proposition 13, annual property tax on a real estate purchase of a single family residence is 1.25% of the Sales Price. For example, if you purchased a condo for 100,000 ,the annual property tax would be 1,250 per year. Luckily in California, the Property tax is based on the purchase price and will not increase as long as you live in home . The only way the property tax can increase is if additional square footage is added to the property and at that time the property value would be re-evaluated by the County Tax Assessor.