BC Assessment notices for 2026 property values have been mailed to property owners in Duncan. BC Assessment is an independent agency created by the provincial government to value properties in British Columbia for taxation purposes. City officials said assessments are used as a distribution mechanism, while the property tax rate is set by city council each year based on budget requirements. “Assessment increases do not necessarily result in tax increases,” the city said in a statement. The average commercial property value increased from $823,175 to $825,522, up two per cent.