Property assessment

The Municipal Property Assessment Corporation (MPAC) classifies and assesses the value of all homes and businesses across the province. MPAC follows provincial legislation regarding property assessment.

How property assessments are used

Like every municipality in the province, Grimsby, the Region and the school boards use MPAC’s assessment to calculate how much a homeowner or business will be charged in property taxes.

Example: MPAC's current property assessment × tax rate = amount owed in property taxes

Reassessment cycle

Every four years property owners receive their reassessment from MPAC which is phased in over four years. The last reassessment was completed in 2016.

 Property Valuation Date  Applies to Taxation Years
 January 1, 2016  2017, 2018, 2019, 2020, 2021, 2022
 January 1, 2012  2013, 2014, 2015, 2016

Phase-in program for a decrease in value

The phase-in program does not apply to decreases in assessed value. For example, if there has been a decrease in your property's assessed value compared to 2012, it will be reflected immediately in the 2017 tax year.

Assessment roll

We keep a copy of the assessment roll for all properties in the town. The assessment roll is a public document and is available for public viewing during regular business hours. MPAC does not allow electronic copying, (i.e., photocopies, photos, etc.) of the assessment roll.

 I disagree with my property assessment


If your property or a portion of it is classified as residential, farm, or managed forest, the deadline to file a Request for Reconsideration (RFR) with MPAC was April 2, 2018 for the 2018 tax year. If you don’t agree with the results of the RFR, the last day to file an appeal is 90 days after the issue date listed on the RFR results letter you receive from MPAC.


For property classes other than residential, you may choose to either file a Request for Reconsideration (RFR) with MPAC or file an appeal directly to the Assessment Review Board (ARB). The Request for Reconsideration deadline for the 2018 tax year is April 2, 2018, and the ARB Appeal deadline is April 3, 2018. RFR forms are available on the MPAC website or by calling 1-866-296-6722.
 Supplementary assessment
Supplementary and omitted assessments reflect any increase in assessment due to an addition or improvement to a property. If your property is a newly constructed home, it is likely your initial assessment is for the value of the land only. When these situations occur, an assessor from MPAC will assess any additional value. You have the opportunity to appeal this assessment if you believe it is incorrect.
 Improvements and additions to your property
Additions and improvements to your property will produce a change to the market value. For questions concerning assessment and property valuation, please contact the Municipal Property Assessment Corporation (MPAC) at 1-866-296-6722 or visit the MPAC web site 

How your property taxes are calculated


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