Imagine you’re a homeowner who just spent millions of dollars turning your house into a mansion, with over 10 additions and tons of new amenities inside. Then, when it’s time to figure out what your new property tax bill will be on your estate, you argue to the government that your mansion is actually worth less than it was before and, therefore, your taxes should go down ‒ because there’s really no one else who would ever buy it. That counterintuitive argument is essentially what the electric automaker Rivian claims as it fights to lower its property tax bill on seven properties in Normal, including the 4.5 million-square-foot plant. If successful, local taxing bodies like Unit 5 schools and the Town of Normal could lose millions of dollars in tax revenue ‒ or try to make up that lost money from the rest of us.