Chester County Property Tax Appeal — Deadline and How to File
The deadline
Filing deadline
August 1, or the next business day when August 1 falls on a weekend
per the Chester County Board of Assessment Appeals' appeal FAQ, checked 2026-09-10 — source
Who hears it, and where it goes
Your appeal is decided by the Chester County Board of Assessment Appeals.
Where to file
Chester County Assessment Office313 W. Market Street, Suite 4202
West Chester, PA 19382
The form: Notice of Intention of Appeal.
Not accepted by fax or as an electronic copy.
per the Chester County Assessment Office's appeal FAQ, checked 2026-09-10 — source
Nearby counties
- Delaware County — Delaware County Board of Assessment Appeals
- Montgomery County — Montgomery County Board of Assessment Appeals
- Lancaster County — Lancaster County Board of Assessment Appeals
- Berks County — Berks County Board of Assessment Appeals
- Philadelphia County — Board of Revision of Taxes
- Bucks County — Bucks 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 30.58% of current market. Confirm the ratio on your notice (53 Pa.C.S. §8854).
Chester 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 Chester 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 Chester 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 Chester County?
- The deadline is August 1, or the next business day when August 1 falls on a weekend — per the Chester County Board of Assessment Appeals' appeal FAQ, checked 2026-09-10.
- Who decides my appeal in Chester County?
- The Chester County Board of Assessment Appeals.
- Where do I send my appeal in Chester County?
- To the Chester County Assessment Office, 313 W. Market Street, Suite 4202, West Chester, PA 19382 — per the Chester County Assessment Office's appeal FAQ, checked 2026-09-10. The form is the Notice of Intention of 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 Chester 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].