BC Assessment is based on the tax roll number, where as Parcelmap BC is based on PID alone. For most properties, searching either BC Assessment or Parcelmap BC will yield the same results, as most properties have only one tax roll number for each property. However in some cases, it is possible that one property is comprised of several tax roll numbers, or one tax roll number can cover several properties. If the property you are searching for falls within one of these unique scenarios, searching by PMBC or BCA will return different results.