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. Allegheny last ran a county-wide reassessment in 2024; PA assesses at full market value, so your assessed value is the County's opinion of your market value. The Common Level Ratio (CLR) discount applies on appeal — for tax year 2026 Allegheny's CLR is well below 100%, so even a parcel near its sale price is frequently appealable.
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1. Confirm your assessed value on the Allegheny County assessor portal. 2. Find your market value (recent sale, or assessed ÷ CLR). 3. If over-stated, file an appeal with the Allegheny County Board of Property Assessment Appeals & Review (BPAAR) on or before March 31 2027. 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 Allegheny owners with vetted contingency firms.
Confirm the official deadline → Get matched with a contingency appeal firm →against the sourced county board date.
Investor? If you're researching a delinquent Allegheny parcel to bid at a tax sale, see the tax-deed redemption + surviving-lien desk →