Some Chicagoland homeowners could see a big uptick in taxes under the GOP tax plan, according to a report released by Moody Analytics. Lake County would see the biggest home value dip in the state, sliding 9.6 percent.

Crain’s Chicago Business reported on the data released early December, citing Lake, McHenry, Will, and DuPage among the 30 U.S. counties that will lose the most potential growth in home values. For many Chicagoland homeowners, the Great Recession is still impacting the values of their homes as the Midwestern hub is among the slowest recovering real estate markets in the country.

According to the report, Cook County will see the smallest loss in growth of 5.7 percent. This is largely due to the lower property taxes in Chicago compared with the suburbs. 

McHenry County will see 8.3 percent, Will County 7.4 percent, DuPage County 7.0 percent, and Kane County 6.5 percent. The figures released by Moody are in-line with predictions from the National Association of Realtors’ forecast impact from the tax plan.

Property taxes in Illinois are among the highest in the nation, and under the GOP tax plan deductions for mortgage interest and property taxes would be the main cause of reduced home values. New Jersey is the only state in the country with higher property taxes.

When making a home purchase, cost of ownership typically includes deductions for property taxes and mortgage interest. The Senate’s tax plan eliminates the federal property tax deduction, while the House version caps it at $10,000.