The information on this page will help you understand how the assessor determines the Real Market Value and Assessed Value for each property in Multnomah County.
The amount of taxes you owe is based on these values. How your tax bill is calculated.
View your tax statement, check your property value, taxes due, property description, and much more at www.MultCoPropTax.com
See a graph of the last five years of your property value and taxes.
Why do I receive multiple tax bills when I only have one property? Interested in consolidating your property?
Assessed Value (AV) is the lower of last year’s Maximum Assessed Value (MAV) plus 3%, or the current Real Market Value (RMV). This value provides the baseline for your tax bill calculation.
Per Oregon Revised Statute (ORS) 308.205(1): Real market value of all property, real and personal, means the amount in cash that could reasonably be expected to be paid by an informed buyer to an informed seller, each acting without compulsion in an arm’s-length transaction occurring as of the assessment date for the tax year.
The above is part of the definition, the remainder is under ORS 308.205 (2)(a)(b)(c) and (d). Please reference the link above for the complete definition of Real Market Value (RMV).
To estimate the RMV of your property, the Assessor’s office appraises your property using a variety of data collection and other methods including:
Maximum Assessed Value (MAV) was established by Ballot Measure 50 for the 1997-98 tax year.
Assuming no changes are made to the property, MAV is calculated as the greater of 103% of the prior year's assessed value (AV), or 100 percent of the prior year's MAV.
MAV’s for properties that existed prior to 1995 were set based on the 1995-1996 Real Market Value (RMV) less 10%. MAVs for “new” properties (constructed or created after 1995) are set by multiplying the property's Real Market Value (RMV) as of the assessment date of January 1st following the year of construction or creation by the Changed Property Ratio (CPR) for that year.
MAV is the only component of your property taxes where a 3% increase limit applies. However, your MAV can increase above 3 percent of the prior year's assessed value if certain changes, known as exceptions, are made to your property.
For more information about Maximum Assessed Value, please refer to the Oregon Department of Revenue’s Maximum Assessed Value manual.
Your Assessed Value (AV) can increase for two reasons:
See a graph of the last five years of your property value and taxes.
For information regarding the Assessed Value for a specific property, please contact our customer service department by phone (503) 988-2225 or by email at propertytax@multco.us. Have your account number or property ID available.
Ballot Measure 50 limits MAV increases to 3% per year except under certain circumstances including, but not limited to:
In these cases, the Assessor appraises the property to determine how much Real Market Value was added by the change(s) to the property."
Please refer to ORS 308.149 and OAR 150-308-0160 for more information
General Ongoing Maintenance and Repair refers to maintenance and repair items completed over a period of years as-needed, and, with multifamily properties, scheduled to take place. This is in contrast to rehabilitation and/or renovation where many components of the property are replaced within a short period of time for a residential property, and/or a short time period involving many units for income properties.
Please refer to OAR 150-308-0130 for more information.
Property values and taxes on real property are tied to the property, not the owner. The previous owner may have done work to the property that was discovered at the time of sale.
Your account number is the same as your property ID. It is listed at the top and the bottom of your tax statement.
Top of your tax bill:
B ottom of your tax bill: