The Municipal Property Assessment Corporation (MPAC) is responsible for assessing all properties in Ontario. 

In 2016, MPAC will update the assessed values of more than five million properties in Ontario based on a legislated valuation date of January 1, 2016.

For the 2016 province-wide Assessment Update, MPAC is delivering Property Assessment Notices earlier than ever before. This change is being made as part of the organization’s commitment to bring greater stability and predictability to the property assessment and taxation system.

Residential property owners can expect to receive their Property Assessment Notice May 16th, 2016.

For information on how assessment works, market trends, the Request for Reconsideration process and property assessment and taxation, visit If you would like to see the information MPAC has on file or your property or compare your property to others in your area, you can register and login using the Roll Number and Access Key located on your Property Assessment Notice.


Do you have questions about your 2016 Property Assessment Notice? Visit or contact the Municipal Property Assessment Corporation (MPAC) Customer Contact Centre at 1-866-296-MPAC (6722), or 1-877-889-MPAC (6722) TTY.

What if I don't agree with my assessment?

If property owners disagree with MPAC’s assessment or classification of their property, they can file a Request for Reconsideration (RfR) and MPAC will review their assessment, free of charge. The deadline to file an RfR is included on each property owner’s Notice.

There are two ways to file an RfR:

1. At Property owners will be able to attach documents, pictures and reports to accompany their RfR, as well as check the status of their request. They may also mail or fax their form to MPAC. Forms are available at
2. Write a letter to request an RfR. The letter should include the 19-digit Roll Number found on the Property Assessment Notice, the owner’s full name, address and phone number, and the reasons why their assessment is incorrect, including any information they have to support their request.

Starting in 2016 (for the 2017 property tax year) property owners will have 120 days from the Issue Date of their Property Assessment Notice to file a free RfR, to ensure they receive a fair and consistent review of property assessment concerns. The Issue Date and the property owner’s unique RfR deadline will be included on every Property Assessment Notice.

For more information, refer to:

MPAC will send a letter with the results of their review within 180 days (or less) of when the request is received. With more complex scenarios, MPAC may need more time (up to 60 more days) to reconsider a property assessment and complete the review. MPAC will contact the property owner if they need more time. Once a decision has been made, MPAC will mail a letter advising the owner about the outcome of their review.

If the owner disagrees with the outcome, they have the option to file an appeal with the Assessment Review Board (ARB), an independent assessment appeal tribunal of the Ontario Ministry of the Attorney General.

Property owners have 90 days after MPAC has notified them of its decision about the RfR to file an appeal with the ARB. The ARB has its own appeal process. For more information, please contact the ARB at 1- 866-448-2248 or 416-212-6349 or visit

To request that a property be eligible for the farm or managed forest classes or conservation land exemption, an RfR must be filed with the respective program administrator at the Ministry of Natural Resources and Forests or the Ministry of Agriculture Food and Rural Affairs.

For any other property type, property owners can choose to either file an RfR with MPAC or file an appeal with the ARB.

A tax account is only adjusted when the City is notified of the change in assessment by MPAC or the ARB. It is recommended that taxes continue to be paid while an appeal or reconsideration is underway to avoid penalty and interest charges in the event that the appeal or reconsideration is not successful. There may be a significant delay between the time an assessment is appealed and a decision is rendered.

Where can I get more information on assessments in my neighbourhood?

Visit and check out AboutMyProperty, a secure, online service that provides property owners with access to basic property valuation information. Through AboutMyProperty property owners have access to their assessment roll information and assessment roll values on comparable properties of their choice. There is no charge for this service.


Related Links:
   Municipal Property Assessment Notices to Be Mailed Out Starting May 16