Property Assessment

How Property Taxes are calculated

To help provide clarity for property owners on how property taxes are calculated, including the link between property assessment, municipal service costs and required tax dollars, watch MPAC’s helpful and informative new video.


MPAC's role is to accurately assess and classify all properties in Ontario in compliance with the Assessment Act and regulations set by the Government of Ontario. We are the largest assessment jurisdiction in North America, assessing and classifying more than five million properties with an estimated total value of $2.4 trillion.
MPAC’s province-wide Assessment Updates property values that have met international standards of accuracy. Our assessors are trained experts in the field of valuation and apply appraisal industry standards and best practices. More than 300 of our valuation staff hold professional designations from recognized accrediting bodies. Our assessments and data are also used by banks, insurance companies and the real estate industry.

Sudbury Assessment Office
1730 Regent Street, Suite 1
Sudbury ON  P3E 3Z8
Toll Free1 866 296-MPAC (6722)
Monday to Friday – 8 am to 5 pm