To verify your local county property tax notice reflects an accurate property tax amount according to Federal government collected data regarding home selling prices in your area.
This accurate federal data can be used to appeal an inflated local property tax appraisal... keeping your property taxes accurate, and not an inflated amount.
Use this link to the FHFA House Price Index Calculator
Complete the information requested.
I also recommend looking at a couple recent home sale real estate books, like the once provided free at doctors offices or restaurants.
Look for property similar to your property both in lot size and home size to see the selling prices as a comparison to your property.
Just because a home is listed at a certain price in a real estate book doesn't mean it sold for the listed price.
The FHFA house price index calculator is based on actual average selling prices.
If the local appraisal amount is significant different than shown by the federal government, use federal information to successful appeal the local property tax appraisal notice to bring your property tax inline with actual home price market values.
Remember, in most states, you have only 30 days or less to file your appeal notice.