The 2026-2029 Property Tax Period Begins June 30, 2025 As of December30, the property tax amounts that will be valid between 2026-2029 have been finalized. But this time the situation is much different than in previous years. The rates of increase in the unit values of land and land square meters determined by the Decrees commissions have turned into a tax shock across the country, so to speak. In some regions, these increase rates were up to 10 times, and in some places up to 30 times. These increases will put both investors and property owners under a serious financial burden, especially in metropolitan cities such as Istanbul, Ankara, Izmir, Antalya and Trabzon. Because these increases are not only “value determination”, but also directly determine the new period of property tax debt. Why Such a High Increase? These values, determined by the Decrees, constitute the basic tax value of the plots and lands within the borders of the municipalities. These values are determined every four years and are based on the calculation of many public costs, such as property taxes and land registry fees. in these updates made for the period 2026-2029, astronomical value increases were achieved in many regions, especially by citing urban transformation, transportation projects and real estate mobility. However, it is the common opinion of many experts that these value increases do not coincide exactly with the real market dynamics. The Constitutional Court's 2024 Decision: A Precedent-Setting Step So what should property owners do? It is at this point that a very important decision made by the Constitutional Court in 2024 comes into play. Previously, only taxpayers who received written notification could file a lawsuit. However, with this decision, citizens who have not received notification and are not aware of the change will also be able to file a lawsuit. This is a historic opportunity for property owners. Because many citizens are not even aware of the value increases. But when they face high taxes, it will be too late. For this reason, the exercise of legal rights is of great importance for both individual and social consciousness. Deadline to File a Lawsuit: September 7 is the Last Day! The process of filing a lawsuit has started as of July 21, 2025. The deadline for application is September 7, 2025. This date is related to public order and is of a degrading nature. In other words, if the application is not submitted by September 7, the case will no longer be filed in any way. Property owners should not ignore this process Decently. We are especially warning CEESS Globally: The high tax burden prolongs the return period of the investment, reduces the strength of your rental income against taxes and increases the cost elements when you want to sell your property. An insensitivity that will happen right now will bind you for the next four years. What Should He Do? Contact Your Relevant Municipality: Find out the new unit values of your plot or land. Dec. You have the right to learn even if this information is not communicated to you. Contact Your Lawyer: If the increase in value is prostituted and contradicts market conditions, you can file a lawsuit for cancellation of the appreciation transaction without wasting time. Evaluate the Bulk Application Options: Opening a class action lawsuit by merging with property owners in the same neighborhood reduces the cost and increases the power of influence. Consult CEESS Global: Together with our expert team, we offer you special legal guidance and market value analysis support.