The Assessor Parcel Data eService provides information about a parcel. The information is based on your Fee Parcel number. The information provided is intended for personal use only. For questions about this eService please contact the Napa County Assessor. Directions: Enter a Fee Parcel number into the Value column and click on the Submit button. Here is a Parcel number example 003216010000 or 003-216-010-000. If you don’t know the Fee Parcel number it can be found on a tax bill or you can use the My Property Online Service to search for the Fee Parcel number by address. For more ways to search for information on a Parcel read the Assessor Parcel Data eService help file.