There are several companies that provide this type of service, known as property tax appeals services.
One such company is Property Tax Adjusters, Ltd. They offer a "done for you" service where they handle all aspects of the appeal process, including gathering evidence and presenting your case to the local assessor's office. They charge a contingency fee based on the amount of savings they are able to obtain for you, so you don't have to pay anything upfront.
Another company that provides similar services is Property Tax Defender. They also offer a full-service approach to property tax appeals, including filing paperwork, gathering evidence, and representing you at hearings. They charge a flat fee for their services, which varies depending on the complexity of your case.
If you are based in Kansas City, MO or KS, you may want to consider reaching out to the local tax assessor's office to learn more about the appeal process and the specific requirements for filing an appeal. You can also search for property tax appeal services in the area, such as KC Property Experts, which provides property tax consulting and appeal services in the Kansas City metropolitan area. Another option is the law firm of Lathrop GPM, which has an office in Kansas City and offers property tax appeal services to commercial and residential property owners.
If you are based in Memphis, TN, you may want to consider contacting the Shelby County Assessor's Office for information on the appeals process and requirements. You can also search for property tax appeal services in the area, such as ProTax Appeal, which provides property tax appeal services to commercial and residential property owners in the Memphis area.
If you are based in Chicago, IL, you can contact the Cook County Assessor's Office for information on the appeals process and requirements. You can also search for property tax appeal services in the area, such as Property Tax Relief, which provides property tax appeal services to residential and commercial property owners in Cook County.
I hope this information helps you in your search for a property tax appeals service. Good luck!