A little-known provision of the British Columbia Assessment Act could become a bigger factor in protecting single-family homeowners from the effect of rising property assessments in Vancouver’s high-priced market, a prominent appraiser and tax agent argues. Section 19.8 is designed to protect long-term homeowners in a neighbourhood from land-use changes, such as rezoning or subdividing. These changes can drive up property values by assessing a property based on potential for redevelopment rather than its actual use.