Pennsylvania property owners should be aware of swiftly approaching tax assessment appeal deadlines throughout the Commonwealth.

Berks, Bucks, Chester, Dauphin, Delaware, Erie, Lancaster, Lehigh, and York Counties have a deadline of August 1 for their annual appeals. If you own properties in those counties, time is quickly running out to evaluate your assessment for possible appeal.

With the exception of Allegheny County with its March 31 deadline, most other counties not using 2010 as a countywide reassessment year have a filing deadline of September 1 for their annual appeals. For those counties undergoing countywide reassessments (including Cumberland and Adams Counties), the appeal deadline will appear on the face of the reassessment notice (and may have already passed for this year). Even if you have missed the deadline for appealing a reassessment notice, you still can challenge the amount of that assessment during the annual appeal process in 2011.