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City of Philadelphia


How OPA Assesses Property

How does the Office of Property Assessment (OPA) evaluate your property? Learn what methods the OPA uses to establish an accurate property assessment.

Property Assessment Data

The Office of Property Assessment has conducted a full reassessment of all real property in Philadelphia as part of its work to maintain accurate, fair, and understandable property assessments.

First Level Review & Appeals

In the event that you disagree with the assessed value of your property, learn what steps you need to take to start the appeal process.

What's New

Trending Methodology
OPA Mails Tax Year 2020 Assessment Notices
Expiring Abatement? Apply for Homestead Exemption
Updated Homestead Status Display on Property Search Website
Language Services and Translated Documents Available from the OPA


A selection of terms relating to Assessments.

  • Assessment Date
  • Assessment Equity
  • Assessment Progressivity (Regressivity)
  • Assessment Ratio
  • Assessment Ratio Study
  • Geographical Market Area (GMA)
  • Level of Assessment; Assessment Ratio
  • Reappraisal
  • Reappraisal Cycle
  • Reassessment
  • Reevaluation
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