Allegheny County property tax appeals
Your window closes Tuesday, September 1. 12 days left.
Reassessment schedules vary by locality in Pennsylvania. Your notice, when one arrives, states your deadline.
Appeals go to Board of Property Assessment Appeals and Review.
Pennsylvania assesses your home against a base year value, and each year the state certifies a common level ratio to compare it with current market value. An appeal makes sense when recent sales show your value is too high after applying that ratio. It usually will not help if your bill rose only because the millage rate went up.
- Recent comparable sales show your home's market value, divided by your county's common level ratio, is below your assessed value.
- Your county has not reassessed in years, so an old base year value may no longer match your home.
- Your county's common level ratio is low, which magnifies even a small over-assessment.
- Your bill went up but your assessment is fair. A higher bill often comes from the millage rate, not the value.
- You are unhappy with the total tax with no evidence the value is too high. The board reviews value, not the size of the bill.
Read the full explanation
In Pennsylvania, your county assesses your home against a base year value, and each year the State Tax Equalization Board certifies a common level ratio that translates today's market value into that base year. If you think your assessment is too high, you appeal to your county's board of assessment appeals, and an appeal you file this year takes effect for next year's tax bill. An appeal helps when recent comparable sales show your home's market value, divided by the common level ratio, is below your assessed value. It usually will not help just because your tax bill went up, since a higher bill can come from the millage rate, not your assessment. Deadlines, fees, and forms are set county by county. This is general information, not tax advice.
Source: Pennsylvania State Tax Equalization Board (common level ratio FAQ) · checked 2026-07-16. In Florida we run the numbers for you. In Pennsylvania we give you the deadline, where to file, and the rules, verified against official sources.
- 2026 filing deadline:
- Tuesday, September 1, 2026
- Filing window:
- File between July 1 and September 1 for the following tax year. Allegheny now hears annual appeals prospectively; the 2027 tax year window is July 1 through September 1, 2026.
- Where to file:
- Board of Property Assessment Appeals and Review
- Filing fee:
- Free (the county states there is no filing fee for annual appeals)
- Phone:
- 412-350-4636
- County portal:
- www.alleghenycounty.us/Services/Property-Assessments-and-Real-Estate/Appeals/Annual-Appeals
- Common level ratio:
- 49.3% (2025, effective July 1, 2026 to June 30, 2027)
Verified against official sources, approved 2026-07-16.