On August 17, 2026, Flavia E. Laun v. Allegheny County ended 14 years of legal and political inaction. Judge Kenneth G. Valasek of the Allegheny County Court of Common Pleas ordered the county to commence its first full countywide property reassessment by July 1, 2027, and complete it no later than June 30, 2032. Regular reassessments every five years are required going forward.
The news coverage framed this as a correction of unfair valuations—a long-overdue reset after decades of stale 2012 base-year numbers. That framing is partly right. What it mostly leaves out is the direction the reset will run for most homeowners: up.
Allegheny County’s Common Level Ratio—the measure of where assessed values sit relative to current market values, published annually by the State Tax Equalization Board—is 49.3% for the 2027 tax year. Translated: assessed values across the county currently average roughly half of actual market value. For the majority of homes in neighborhoods that have appreciated since 2012, that means the current assessment is already well below the benchmark. When the reassessment arrives, it will close the gap. For those homeowners, that is not relief. It is a higher bill, phased in over five years.
The ruling is binding and specific. Allegheny County must materially commence a full countywide reassessment by July 1, 2027. The reassessment must be completed and new values implemented no later than June 30, 2032. The order also requires that the county conduct a full reassessment every five years going forward—ending the pattern of indefinite deferrals that produced a 14-year base-year gap.
The case was brought by a property owner arguing that the 2012 base year had produced assessment disparities that violated the Pennsylvania Constitution’s uniformity clause. Under 53 Pa.C.S. Ch. 88, Pennsylvania counties are required to assess all properties at a uniform percentage of market value. After 14 years of unchanged base values and a housing market that moved significantly, the actual tax burden on individual properties had drifted far from uniformity.
The practical timeline: county officials must begin contracting and staffing a reassessment by mid-2027. The five-year window to 2032 is long by national standards—most reassessments run 18–24 months—which likely reflects the scale of the county (over 580,000 parcels) and the political sensitivity of the undertaking.
The Common Level Ratio is the mechanism Pennsylvania uses to create a level playing field in appeals even when base-year assessments are outdated. It represents what assessed values actually are, as a fraction of current market value, based on a rolling sample of verified sale prices. For Allegheny County, the CLR for 2026 is 50.14%; for 2027 it drops to 49.3%.
Here is what that means in practice. A home that sold for $380,000 in 2024 has a current market value somewhere in that range. If that home carries a 2012-era assessed value of $130,000, the implied market value under the CLR is $130,000 ÷ 0.493 = $263,690. That implied market value is substantially below the actual value. The home is under-assessed. When the reassessment arrives and values are set to current market, the assessment will rise—and so will the annual bill.
This is not a flaw in the reassessment; it is the point of it. Fourteen years of unchanged values, during which Pittsburgh-area home prices rose significantly, left a large share of properties taxed at a fraction of their proportional share. The uniformity clause requires that all properties pay the same percentage; the reassessment restores that uniformity. For most homeowners in appreciating neighborhoods, restoration means paying more.
The narrative around court-ordered reassessments almost always uses the language of fairness and correction. Both are accurate. What is underreported is that a fairness correction moves bills in both directions: properties that were taxed above their proportional share will see relief, and properties that were taxed below their proportional share will see increases. After 14 years of appreciation, the second group is the larger one in most Allegheny County neighborhoods.
A reassessment is not a tax cut. It is a redistribution of the existing tax burden according to current market values. Whether that redistribution is good or bad news depends entirely on where your specific property sat in the gap.
The CLR test is the quickest screen. Divide your current assessed value by 0.493. If that number is higher than what your home would realistically sell for today, you are over-assessed relative to the county standard and have a legitimate appeal case. If it is lower, your current assessment is already below the CLR benchmark and you are not over-assessed under Pennsylvania’s current framework.
Three categories of Allegheny County properties are most likely to be over-assessed under this test:
If you fall into one of these categories, the relevant comparable sales evidence is the same as in any appeal: sales of similar properties in similar condition, sold within 12 months of the relevant assessment date, adjusted for meaningful differences. Allegheny County does not have an informal review desk—the first level of appeal is a formal hearing before the Board of Property Assessment Appeals and Review (BPAAR).
The annual appeal window for the 2027 tax year closed September 1, 2026. Unless you receive a special change-of-assessment notice (which triggers its own 40-day window under county ordinance), you cannot file a new appeal under current values until the 2028 window opens.
Based on Allegheny County’s advance filing schedule established by County Ordinance 06-24-OR, the 2028 annual appeal window is expected to open in mid-2027. That window is the next opportunity to act on the over-assessment calculation above.
What to do now (before mid-2027)
Run the CLR test: take your current assessed value and divide by 0.493. If that implied market figure exceeds what your home is realistically worth today, you likely have a case. Document your property’s current condition. Begin identifying comparable sales in your neighborhood from the past 12 months—these become your evidence when the 2028 window opens. A real estate attorney or assessment professional familiar with BPAAR hearings can assess the strength of the case before you invest time in preparing it.
It is worth noting that the court-ordered reassessment does not eliminate the annual appeal process. The 2028, 2029, 2030, and 2031 filing windows will all use the existing 2012-era assessed values, because the new values will not be certified until 2032 at the earliest. If your home is over-assessed today, every year you do not appeal is a year of excess taxes that cannot be recovered retroactively. The reassessment delivers relief for future years; only an annual appeal during the current cycle reduces what you owe now.
Allegheny County does not offer an informal pre-hearing review with the assessor (this is a Philadelphia-specific procedure). The first level of appeal is a formal hearing before the Board of Property Assessment Appeals and Review (BPAAR), a three-member quasi-judicial body. Evidence is presented, the assessor may respond, and the board issues a written decision.
If dissatisfied with the BPAAR outcome, a homeowner may escalate to a de novo hearing before the Board of Viewers at the Allegheny County Court of Common Pleas—a fresh hearing on the merits, not a review of the BPAAR’s reasoning. The escalation deadline is 30 days from the BPAAR decision. For more on how appeal deadlines work across states and what a second-level escalation involves, see the post-denial guide.
The 30-day post-BPAAR window is unforgiving. Mark the decision date, not the date you received the mailed notice. These are frequently different by several days, and the clock runs from the decision.
The court order resolves the legal question of when—not whether—Allegheny County will reassess. It does not resolve the economic question of what the new values will be, nor the political question of how the new millage rates will be set in response. Under Pennsylvania’s base-year system, reassessments frequently trigger what residents call “millage rollbacks”: taxing bodies lower the rate to prevent windfalls from higher assessed values, so that the total levy remains roughly revenue-neutral. Whether that happens in Allegheny County, and by how much, depends on decisions by the county, school districts, and municipalities that have not yet been made.
What the reassessment will change is the distribution of the existing levy. Properties that are currently under-assessed relative to the CLR will pay a larger share; those currently over-assessed will pay a smaller share. The reassessment itself does not determine the total tax collected—that remains a function of the levy set by elected bodies.
For homeowners planning purchases in the county between now and 2032, the risk is significant: a home purchased today at a price well above its 2012-era assessed value will likely carry a taxing-body appeal risk under the current cycle, and a substantially higher assessment under the new one. Buyers should model the post-reassessment tax exposure as part of any acquisition analysis.
For more on the Pennsylvania property tax system, related appeals procedures, and what constitutes strong evidence, see: