Allegheny County Property Tax Appeal — Deadline and How to File
The deadline
Filing deadline
September 1, or the next business day when it falls on a weekend or holiday
Allegheny County Administrative Code § 5-210.09C
Who hears it, and where it goes
Your appeal is decided by the Board of Property Assessment Appeals and Review.
Where to file
Board of Property Assessment Appeals and ReviewCounty Office Building
542 Forbes Ave., Room 334
Pittsburgh, PA 15219
The form: Assessment Appeal Form — one for each parcel.
Filed by mail, by hand delivery, or by email, as a signed and scanned application, to [email protected].
per the Board of Property Assessment Appeals and Review's 2027 Assessment Appeal Form, checked 2026-09-10 — source
Nearby counties
- Washington County — Washington County Board of Assessment Appeals
- Westmoreland County — Westmoreland County Board of Assessment Appeals
- Butler County — Butler County Board of Assessment Appeals
- Armstrong County — Armstrong County Board of Assessment Appeals
- Indiana County — Indiana County Board of Assessment Appeals
- 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 49.26% of current market. Confirm the ratio on your notice (53 Pa.C.S. §8854).
Allegheny 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 Board of Property Assessment Appeals and Review 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 Board of Property Assessment Appeals and Review 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 Allegheny County?
- The deadline is September 1, or the next business day when it falls on a weekend or holiday — Allegheny County Administrative Code § 5-210.09C.
- Who decides my appeal in Allegheny County?
- The Board of Property Assessment Appeals and Review.
- Where do I send my appeal in Allegheny County?
- To the Board of Property Assessment Appeals and Review, County Office Building, 542 Forbes Ave., Room 334, Pittsburgh, PA 15219 — per the Board of Property Assessment Appeals and Review's 2027 Assessment Appeal Form, checked 2026-09-10. The form is the Assessment Appeal Form, one for each parcel.
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 Allegheny 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].