Should I appeal my property taxes?

Only if the numbers are clearly wrong. If your tax bill says your home is worth $500,000, but you know you could only sell it for $420,000, then yes—appeal immediately. You have a short window (usually 25 days after the TRIM notice is mailed) to file a petition. If the assessed value matches what neighbors are selling for, don't waste your time; you won't win.

Its a good idea to call your assessors office and express your concern and see what they can do. It often can be determined by talking to one of the county appraisers if there was a mistake. If there was no mistake then the likelihood of them reducing your tax assessment is very minimal.