Pennsylvania assesses at market value (Allegheny) or a fraction of it via the county's Common Level Ratio (CLR). If the County's number is higher than what your property would actually sell for, you're over-assessed — and likely over-paying. Philadelphia issues annual OPA assessments; the first-level appeal is to the BRT, and a separate informal First Level Review (FLR) runs earlier in the year. Confirm both windows with the BRT.
Honest null: Philadelphia County's live assessment roll isn't onboarded yet, so we can't run the per-parcel over-assessment check here. Use your county's assessor portal + the Common Level Ratio (CLR) to test your own parcel, or see the live Allegheny example.
1. Confirm your assessed value on the Philadelphia County assessor portal. 2. Find your market value (recent sale, or assessed ÷ CLR). 3. If over-stated, file an appeal with the Philadelphia Board of Revision of Taxes (BRT) on or before first Monday in October 2026. 4. Present comps at the hearing.
Most owners who win use a contingency property-tax appeal firm — it costs nothing unless they cut your bill, then takes a share of the first-year saving. We connect Philadelphia owners with vetted contingency firms.
Confirm the official deadline → Get matched with a contingency appeal firm →against the PA statutory class deadline (53 Pa.C.S. §8844).
Investor? If you're researching a delinquent Philadelphia parcel to bid at a tax sale, see the tax-deed redemption + surviving-lien desk →