Armstrong County Property Tax Appeal — Deadline and How to File
The deadline
Filing deadline
September 1
per the Armstrong County Board of Assessment Appeals' appeal filing notice, checked 2026-09-10 — source
Who hears it, and where it goes
Your appeal is decided by the Armstrong County Board of Assessment Appeals.
Where to file
Armstrong County Board of Assessment Appeals450 East Market Street, Suite 20
Kittanning, PA 16201
The form: Notice of Intention to Appeal.
A filing fee is due with the appeal.
Appeals are accepted from July 15 through September 1.
per the Armstrong County Board of Assessment Appeals' Notice of Intention to Appeal, checked 2026-09-10 — source
Nearby counties
- Indiana County — Indiana County Board of Assessment Appeals
- Butler County — Butler County Board of Assessment Appeals
- Jefferson County — Jefferson County Board of Assessment Appeals
- Westmoreland County — Westmoreland County Board of Assessment Appeals
- Allegheny County — Board of Property Assessment Appeals and Review
- Venango County — Venango County Board of Assessment Appeals
More: the county index and the Pennsylvania guide.
What your assessed value means here
Pennsylvania — assessed at a base-year value; the STEB Common Level Ratio for your county is about 24.57% of current market. Confirm the ratio on your notice (53 Pa.C.S. §8854).
Armstrong County's common level ratio is drawn from the 2025 CLR (2024 sales data; effective 7/1/2026–6/30/2027) table — the same figure the app uses to compare your assessment to current market value.
Can the board raise your assessment?
Yes. The Armstrong County Board of Assessment Appeals can raise your assessment on your own appeal, not only lower it. That is the risk you take by filing, and it is why the case has to be worth making before you file it.
What a board actually weighs
The Armstrong County Board of Assessment Appeals decides what your property was worth on the valuation date, so recent comparable sales carry the case, not the size of the bill. The Pennsylvania guide covers the evidence.
Common questions
- When is the deadline to appeal my property assessment in Armstrong County?
- The deadline is September 1 — per the Armstrong County Board of Assessment Appeals' appeal filing notice, checked 2026-09-10.
- Who decides my appeal in Armstrong County?
- The Armstrong County Board of Assessment Appeals.
- Where do I send my appeal in Armstrong County?
- To the Armstrong County Board of Assessment Appeals, 450 East Market Street, Suite 20, Kittanning, PA 16201 — per the Armstrong County Board of Assessment Appeals' Notice of Intention to Appeal, checked 2026-09-10. The form is the Notice of Intention to Appeal.
Sources
Property tax rules and deadlines vary by jurisdiction and can change — verify with your county before relying on this.
PROppeal is coming soon for Armstrong County
When it launches, PROppeal will check your case against real, recent comparable sales and give you an honest verdict — then build the board-ready letter to file — $29.99, no percentage of your savings.
Want a heads-up when it’s live? Email [email protected].