If you just look at your improvement assessment, you probably will not succeed:
You are taxed on the total assessment (both land and improvements). If you appeal, we will concentrate on your total assessment.
It is possible that the assessed value of your building is too high. But, it is also possible that your land value is too low.
You have finished evaluating this issue.
Note on improvement values:
Sometimes improvement values can go up, even if the buildings stay the same.
This can happen when the costs to build increases. Buyers may then pay more for older improvements.
Your assessment should be at your property's market value. If real estate values increase, you should expect your total assessment to increase. When BC Assessment allocates this total value to land and improvements, both may increase.