Philadelphia’s Office of Property Assessment has released Tax Year 2027 property values for the city, with notices mailed beginning June 29th, 2026 and assessments taking effect January 1st, 2027.
The update sets new tax liabilities across commercial and mixed-use properties as managers finalize budgets and leasing plans for next year.
City Releases 2027 Assessments and Mailing Timeline
The Office of Property Assessment began mailing notices on June 29th, 2026, and the new assessments become operative on January 1st, 2027.
Commercial owners are weighing the results against current conditions, as the city relies on mass-appraisal techniques to distribute values.
That method can miss building-specific details material to complex assets in Center City and neighborhood corridors.
Tax Rate and Assessment Mechanics
Philadelphia calculates real estate tax by applying 1.3998% to the assessed value, so any over-assessment raises recurring costs for owners and operators.
OPA data points such as square footage, condition, age, improvements, and classification influence the assigned value and can affect tax bills if misdescribed.
For continuity, prior coverage of new Philadelphia real estate tax assessments outlines how citywide reassessments interface with property-specific facts.
Market Evidence Shows Divergent Valuations
Market indicators remain mixed, and recent office transactions signal pressure on valuations.
According to reporting by The Philadelphia Inquirer, Centre Square was under agreement in July 2026 at about $70 million, after a 2017 sale around $328 million and a foreclosure tied to substantial vacancy.
Background on commercial valuation pressure and appeal considerations for 2027 underscores that not all assets are moving in tandem, so comparable sales remain critical.
Operational Effects on Multifamily and Mixed-Use Portfolios
For income-producing properties, assessment accuracy tracks directly to rent rolls, occupancy, lease terms, and operating expenses that drive net operating income.
Where operating costs are elevated or leases are rolling, inputs can diverge from mass-appraisal assumptions, influencing tax carry and pricing for stabilized and value-add units from University City to the River Wards.
Mixed-use assets with ground-floor retail may show divergent comps versus their residential components, affecting how managers interpret assigned values.
Appeal Timeline and Evidence Owners Should Monitor
Philadelphia property owners have until October 5th, 2026 to file an appeal with the Office of Property Assessment.
Evidence typically includes actual income and expense records, recent sales of the property or comparables, and verification of OPA’s physical and descriptive data.
With assessments effective January 1st, 2027, operators are aligning documentation and reviewing portfolio exposure as tax liabilities roll into next year’s operating budgets.