According to the National Taxpayers Union Foundation, an estimated 30% to 60% of properties in the U.S. are overassessed, leading many homeowners to pay inflated property taxes. However, fewer than 5% of homeowners challenge their valuations, despite success rates of 40% to 60% for proper appeals. Not taking the opportunity to appeal your assessment could mean thousands of dollars lost. You don’t have to take it lying down, though. There are ways you can fight back. Here are seven things you can do if you feel like your home has been overassessed.