If you think the marekt value established for your property is too high:

You can challenge the assessment. Start with the government office that establishes the assessment.

You most likely will have to provide actual sales comparables that show that houses nearly identical to yours sold for less than the vlaue the assessor has given your property.

Alternatively, you can find assessments of houses similar to yours that are lower, and use those as a basis of your complaint. Assessed values are a matter of public record and you should be able to access them.

You can hire a professional, licensed appraiser for a few undred dollars to prepare an appraisal of your property to submit with your complaint.

Check the property record card for your property to see if there are any data errors. For example, maybe you are being assessed for two garages when you really only have one, or your house is being assessed on the basis of 2,500 square feet and you only have 1,500. In my case, the property record card indicated that I had a shed listed with far more value than was resonable. Working with the assessor, we found that there had ben a clerical error and he was more than happy to correct the shed’s value.