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The Municipal Property Assessment Corporation (MPAC) will be reassessing all properties in Ontario in 2016.  Property Assessment Notices with the new assessment will be mailed out to Seguin residential property owners on JULY 11, 2016.  Any increases in your property's assessment will be phased in over the next 4 years, while any decreases will be reflected on your 2017 tax bill.  Please note that, if you disagree with your reassessment, you have 120 days from the date of your Notice to file a Request for Reconsideration with MPAC. 

For more information on the reassessment, please go to or contact MPAC at 1-866-296-6722.

Assessment Value

  • If you feel that the current value assessment assigned to your property is incorrect, please call the Municipal Property Assessment Corporation (MPAC) at 1-866-296-6722.
  • Please have your 19 digit roll number available.
  • You may be required to complete a Request for Reconsideration Form which is available free of charge from MPAC.

Assessment Rolls - Public Records

  • The roll books are available to the public and contain property ownership and assessment information. The roll books are updated annually.
  • For information regarding property assessments/reassessments please visit MPAC's website or call 1-866-296-6722.