Most commercial owners think of an assessment appeal as something they file. In Pennsylvania, it is also something that can be filed against them. School districts, municipalities, and counties all have the statutory right to appeal an assessment they believe is too low, and school districts in particular use it to pursue recently sold commercial property whose price sits well above the assessed value.
These appeals are routine in many counties, and the case law governing them changed again in 2026. This guide covers where the right comes from, how districts pick their targets, the uniformity limits the Pennsylvania Supreme Court has drawn, and what an owner should do when the notice arrives. EPTA represents commercial owners across Pennsylvania, on both sides of the valuation question: reducing assessments that are too high and defending against district appeals that overreach.
Where the District's Right to Appeal Comes From
Section 8855 of the Consolidated County Assessment Law, 53 Pa.C.S. § 8855, gives a taxing district the right to appeal any assessment within its jurisdiction in the same manner, under the same procedure, and with the same effect as an appeal by the owner. It may also appeal a board or court decision even if it was not a party below, and it may intervene as of right when an owner takes an appeal to court. The Consolidated County Assessment Law does not govern Allegheny or Philadelphia, which operate under their own assessment statutes, but taxing bodies file and defend appeals there too, and Allegheny County school districts regularly appeal recently purchased properties. Philadelphia runs its own calendar and review process, so check the local rules before assuming the statewide framework applies.
The economics explain the pattern. Many Pennsylvania counties have not reassessed in decades, so assessments drift far below market. The school district usually levies the largest share of the tax bill, so it captures the most revenue from a higher assessment. A recorded deed with a price well above the implied market value of the current assessment is the cheapest possible evidence that an assessment is low, which is why a purchase is the single most common trigger.
How Districts Choose Their Targets
The standard method runs through the common level ratio published each year by the State Tax Equalization Board. The district divides the current assessment by the CLR to get an "implied" market value, compares that figure with the sale price or an appraised value, and flags properties where the gap is large. Many districts hire an appraisal firm to run the screen across every parcel with a recorded sale, trend older sale prices forward, and estimate values for properties that have not sold.
The cutoff is usually a dollar figure. Some policies key it to the gap in market value (one Chester County district used a gap of $250,000 or more between sale price or market value and implied value); others key it to the additional tax revenue an appeal would produce (another used $10,000 a year). The policy almost always states that it applies without regard to property type or owner residency, language written to fit the Supreme Court's uniformity decisions. In practice, the properties that clear a dollar threshold skew heavily toward commercial, industrial, and apartment assets, because those are the parcels where a modest percentage gap produces a large dollar figure.
The Uniformity Limits, From Valley Forge Towers to Downingtown
Pennsylvania's Uniformity Clause requires that taxes be uniform on the same class of subjects, and for real estate the courts treat all property in a taxing district as one class. In Valley Forge Towers Apartments N, LP v. Upper Merion Area School District, 163 A.3d 962 (Pa. 2017), the Supreme Court applied that rule to a district that appealed only commercial properties, including apartment complexes, while leaving single-family homes alone. The Court reversed the dismissal of the owners' complaint and held that they had stated a valid uniformity claim: a taxing district may not treat property sub-classifications differently, and the prohibition reaches intentional or systematic differential treatment whether or not the conduct is otherwise wrongful. The Court also noted that it was not deciding whether a monetary threshold applied without regard to property type would violate uniformity.
That open question produced years of litigation. In GM Berkshire Hills LLC v. Berks County Board of Assessment (2023), the Supreme Court divided 3-3, which left in place a Commonwealth Court decision upholding a policy that appealed recently sold properties appearing underassessed by at least $150,000 (the sale price times the common level ratio, minus the current assessment). In September 2025, in an unreported memorandum opinion involving the Phoenixville Area School District and a restaurant owner, the Commonwealth Court upheld a $250,000 gap policy and rejected the owner's claims that the appeal violated uniformity or amounted to an unlawful spot reassessment.
Then, on May 19, 2026, the Supreme Court decided Downingtown Area School District v. Chester County Board of Assessment Appeals. In a 4-3 decision written by Justice Mundy, the majority held that the use of a monetary threshold, without more, does not violate the Uniformity Clause. The district's policy, there a minimum of $10,000 in additional annual tax revenue, was permissible because it did not create a subclass defined by an impermissible characteristic such as type, use, neighborhood, or owner residency. The Court also held that the district did not violate uniformity merely by appealing some, but not all, of the properties that met the threshold, noting that taxing districts have finite resources and cannot reasonably appeal every qualifying parcel. It vacated the Commonwealth Court's ruling and sent the case back to that court on the owner's remaining issues. Three justices dissented in two opinions, raising concerns that such a threshold in practice rarely reaches single-family homes and that appealing only some qualifying parcels treats them differently.
One question the majority expressly did not decide: whether a policy that looks only at recently sold properties creates a prohibited subclass. That issue matters to buyers, because a sale is still the most common trigger for a district appeal.
The practical takeaway for commercial owners is that the uniformity defense is now narrow. It remains available where a policy names a property type, where a district appeals outside its own written criteria in a way that tracks type or location, or where the record shows the threshold is a pretext. For most district appeals, though, the case will be decided on value, and that is where the preparation belongs.
