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 — 237 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
0029•••	OFFICE-ELEVATOR -3 + STORIES	$11,650,000	$18,782,600	1.61×	~$156,917/yr
0018•••	OFFICE - 1-2 STORIES	$6,500,000	$10,803,000	1.66×	~$94,666/yr
0158•••	COMMERCIAL TRUCK TERMINAL	$2,015,951	$5,858,800	2.91×	~$84,543/yr
0638•••	NEIGH SHOP CENTER	$500,000	$4,300,000	8.6×	~$83,600/yr
0639•••	REGIONAL SHOPPING CENTER	$2,000,000	$4,852,700	2.43×	~$62,759/yr
0265•••	OFFICE - 1-2 STORIES	$7,142,563	$9,300,700	1.3×	~$47,479/yr
0855•••	COMMERCIAL GARAGE	$600,000	$2,474,000	4.12×	~$41,228/yr
0342•••	CHURCHES, PUBLIC WORSHIP	$206,100	$879,600	4.27×	~$14,817/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 — 237 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 2026-08-07 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 →