What is the Allegheny County property tax appeal deadline for 2027?

Allegheny County's 2027 property-tax assessment appeal deadline is March 31. That window has passed; the next deadline is March 31 2027.

How do I appeal my property taxes in Allegheny County?

File an assessment appeal with the Allegheny County Board of Property Assessment Appeals & Review (BPAAR) on or before March 31. Compare your assessed value to your property's market value (recent sale or the Common Level Ratio); if the County over-states it, file. Many owners use a contingency tax-appeal firm that only charges on a win.

I got a Allegheny County reassessment notice — what should I do?

A reassessment notice is the County's new opinion of your market value and the start of your appeal window. Check it against a recent sale or the CLR; if it over-states your value you can appeal by March 31. Do not ignore it — the window is annual.

ParcelEdge › PA appeal deadlines › Allegheny County

Allegheny County Property Tax Appeal Deadline 2027

March 31 Allegheny County's 2026 appeal window has closed. The next annual deadline is March 31 2027 — 147 days away.

Is my property over-assessed in Allegheny County?

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.

PIN	Use	Recent sale	County says mkt	Over	Indic. overpay
0087•••	NURSING HOME/PRIVATE HOS	$3,571,370	$5,321,600	1.49×	~$38,505/yr
0023•••	SMALL DETACHED RET(UNDER 10000)	$1,500,000	$2,587,100	1.72×	~$23,916/yr
0081•••	NURSING HOME/PRIVATE HOS	$1,750,000	$2,634,600	1.51×	~$19,461/yr
0025•••	OFFICE - 1-2 STORIES	$300,000	$930,200	3.1×	~$13,864/yr
0009•••	VACANT COMMERCIAL LAND	$3,500,000	$4,074,000	1.16×	~$12,628/yr
0002•••	OFFICE-ELEVATOR -3 + STORIES	$650,000	$874,300	1.35×	~$4,935/yr
0002•••	CONDOMINIUM UNIT	$392,001	$564,500	1.44×	~$3,795/yr
0020•••	CHURCHES, PUBLIC WORSHIP	$225,000	$376,800	1.67×	~$3,340/yr

Live Allegheny parcels whose assessed market value exceeds their recent arm's-length sale price — a real over-assessment signal. See the full scored feed →

How to appeal — and who files it for you

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 →

FAQ

What is the Allegheny County appeal deadline this year?: March 31 2027 — 147 days to the next window.
I got a reassessment notice — what now?: It's the County's new market-value opinion and the start of your appeal window. Check it; appeal by March 31 if it over-states your value.
Does it cost money to appeal?: A small filing fee in most counties; a contingency firm only charges on a win.

Glossary

Common Level Ratio (CLR): The PA State Tax Equalization Board's annual ratio of assessed-to-market value for a county; dividing assessed value by the CLR yields implied market value used on appeal.
Assessment appeal: A challenge to the County's valuation of your property, filed with the county Board of Assessment Appeals under 53 Pa.C.S. §8844.

Verified 2026-11-05 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 →