Property Assessments

The Municipal Property Assessment Corporation (MPAC) - is a Provincial Crown Corporation that conducts Ontario property assessments.

How property assessment values impact property taxes

Property assessment is a key component of municipal tax systems. However, the MPAC notice you received does not automatically increase or decrease your property taxes.

In general, the potential impact on property tax depends on - and is relative to - other residential property assessments.

Situation Outcome
If your assessment is average No impact
If your assessment value is less than average Lower property tax
If your assessment value is more than average Higher property tax

About property assessment values 

Property assessment values may increase or decrease for a variety of reasons including changes in economic conditions, structural alterations and re-zonings. Details concerning the assessment process and information on the assessed value of your home and neighboring properties can be accessed at the MPAC website.

MPAC's range of services includes:

  • Preparing annual Assessment Rolls for use by municipalities and the Province to calculate property and education taxes.

  • Conducting municipal enumerations to prepare a Preliminary List of Electors for municipalities, school boards and District Social Services Administration Boards to help these organizations create final Voters' Lists for municipal and school board elections.

  • Delivering innovative products and value-added services to banks, mortgage firms and other assessment jurisdictions across Canada

If your assessed value or property classification is not correct you have the right to appeal. The process is as follows:

1. Request for Reconsideration

This is an informal process where you can request a reconsideration of your assessed property value.  Make your request in writing to:

P.O. Box 9808
Toronto ON
M1S 5T9.

A reconsideration form may be acquired on the MPAC site

The request should include valid reasons why you feel your assessment is too high. To back up your request, you are encouraged to find comparable properties in your area and compare the assessed values to your own property.

The deadline to file a "Request for Reconsideration" is March 31st of each tax year. There is no fee for this type of assessment challenge.

2.  File an Appeal with the Assessment Review Board (ARB)

You can also choose to file an appeal with the Assessment Review Board (ARB), an independent tribunal of the Ontario Ministry of the Attorney General.

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