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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

Non-Profit Tax Exemption Audit Update
Homestead Applications Are Now Being Accepted for Tax Year 2016
Reminder--Abated Properties Can No Longer Also Receive the Homestead Exemption
Apply for the Homestead Exemption by Dec. 1 & Save Up to $402 on Your Real Estate Tax Bill
Was your Homestead application denied? Find out how you can reapply for Tax Year 2015


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
Full Glossary