Allegheny County Property Tax Appeal Deadline
Missing the appeal deadline is the most common reason homeowners lose the opportunity to lower their property taxes. Mark these dates on your calendar to ensure you don't miss your chance to appeal your 2026 assessment.
2026 Appeal Deadline
For the 2026 tax year, the appeal deadline for Allegheny County is:
September 1, 2026
This is the last day to file an appeal for the 2026 property tax year. Appeals filed after this date will not be considered for the 2026 tax year.
Important Dates to Remember
Assessment Notice Date
Allegheny County typically mails assessment notices in March. This notice shows your property's assessed value for the upcoming tax year.
Appeal Filing Period
You can file your appeal anytime after receiving your assessment notice up until the September 1 deadline. However, we recommend filing as early as possible to:
- Avoid the last-minute rush
- Get an earlier hearing date
- Have more time to gather evidence if needed
Hearing Schedule
The Board of Property Assessment Appeals and Review (BPAAR) typically holds hearings from spring through summer. If you file early, you may get a hearing date in April or May. If you file closer to the deadline, your hearing may be scheduled for late summer.
What If You Miss the Deadline?
If you miss the September 1 deadline for 2026, your options are limited:
- Wait until next year: You can file an appeal for the 2027 tax year when the next assessment cycle begins
- Check for errors: If there was a clerical error in your assessment, you may be able to request a correction
- Exemption appeals: Some property tax exemptions have different deadlines
Unfortunately, there are no extensions granted for missing the appeal deadline.
How to File Before the Deadline
Option 1: Online Filing (Recommended)
The fastest and easiest way to file is through Allegheny County's online appeal system:
- Visit the BPAAR website
- Create an account or log in
- Enter your property information
- Upload your evidence
- Submit your appeal
Online filing is available 24/7, so you can file at any time before the deadline.
Option 2: Mail Your Appeal
If you prefer to file by mail, make sure to:
- Download the appeal form from the BPAAR website or county office
- Fill out the form completely
- Make copies of all your evidence
- Mail to: Board of Property Assessment Appeals and Review, County Office Building, 542 Forbes Avenue, Pittsburgh, PA 15219
Important: Your appeal must be postmarked by September 1 to be considered timely. We recommend using certified mail with return receipt requested.
What You Need to File
To file a complete appeal, have this information ready:
- Your parcel number (found on your assessment notice)
- Property address
- Current assessed value
- Your estimated market value
- Comparable sales data
- Contact information
Set a Reminder
Don't let the deadline sneak up on you. Set a reminder for:
- August 1: One month before the deadline
- August 15: Two weeks before the deadline
- August 25: One week before the deadline
- September 1: The final day to file
Check If You Qualify
Before the deadline, use our free calculator to check if your assessment appears high. If it does, you can start gathering your evidence and prepare to file.
Need Help?
If you have questions about the appeal process or deadline:
- Read our complete appeal guide
- Learn how appeals work
- Understand the Common Level Ratio
- Contact the BPAAR office: (412) 350-4600