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Assessment & Taxation Pages
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Contact DART
Helpful links for information on Multnomah County Property taxes
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Delinquent Taxes & Liens
When do taxes become a lien on my property?
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How Your Property Taxes Are Calculated
Learn more about how the Property Tax system works in Oregon
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Reports Archive
Access older Assessment & Taxation reports
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Assessment and Appeals
Learn more about your property's assessment and how to appeal the value of your property.
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Accessory Dwelling Units
Learn how adding an ADU will change your property taxes
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Active Duty Military Exemption
Members of the Oregon National Guard or Reserve who are deployed may be eligible for a property tax exemption on their primary residence.
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Assessment and Taxation Forms
Frequently used Assessment and Taxation forms
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Assessor Personal Property Online Portal
The Multnomah County Department of Assessment & Taxation is very excited to launch our new Smartfile E-Filing portal.
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Business Personal Property Filing Requirements
Requirements for filing business personal property taxes in Multnomah County
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Business Personal Property Information
Information about personal property taxes for business owners
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Business Personal Property Return Penalties
Annual Business Personal Property Tax Returns are due March 15th. After August 1st, the penalty for late filing increases to 50%. Contact our office for assistance or to request a replacement form.
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Business Personal Property Tax FAQs
answers to commonly asked questions about business personal property taxes
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Business Personal Property Tax Tips
Tips to help businesses navigate the process of filing Business Personal Property Tax Returns
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Buying or Selling a Business
Info you need when you're ready to buy or sell a business with taxable personal property
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Consolidating Your Property
Too many property tax bills? Consolidating your parcels can help.
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Construction in Progress (CIP)
Oregon provides an exemption for qualified commercial construction projects in progress as of January 1st.
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Core Competency Behavioral Descriptions
Competencies provide a common language for describing professional behaviors important for the organization's success
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Correction of Maximum Assessed Value Due to Square Footage Error
Information to obtain a correction of a property's Maximum Assessed Value Due to Square Footage Error
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Damaged or Destroyed Property
Property taxes may be reduced when property is destroyed or damaged by fire or Act of God or when buildings are removed.
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DART Public Access Terminal (PAT)
Dart kiosk user agreement.
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DART Public Access Terminal (PAT)
Dart kiosk links.
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DART Special Programs
Oregon law provides a variety of property tax exemptions for individuals and certain organizations. Get information about the available programs.
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