Trying to map age of housing for one specific class of property using assessor parcel data – September 23, 2022 at 03:59PM

Trying to relearn gis after a few years not using it. I want to make a map showing the age of the housing stock for a specific class of property using assessor parcel data. I’m a little confused how to do this with both the age and property class data being in the same spreadsheet. Any advice?