True but sales price data is what BC Assessment uses to set your property value and the easiest way of getting an assessment changed.
What I mean is BC Assessment has never been inside my house, they have no idea that the basement is fully finished nor do they know the level of quality of the interior finishes - I could have 99 cent laminate floors, laminate countertops with off the shelf cabinets, ductless heat pumps vs the exact opposite. I like it because my assessed value is low compared to the true value
My neighbor is another good example, he completely renovated his house last year and their assessment is up 4% over last year although the true value probably increased by 40+%