Parcel Data for DuPage Co., IL This parcel layer makes up the county working parcel feature layer for 2016. This is not the end of tax year parcel layer. Some new parcel polygons in this layer may have not been finalized by the County Clerks Office at this time. This parcel data does not contain Real Estate Attribute Data. This Real Estate Attribute Data does have a fee associated to it for its acquisition. This Real Estate Attribute Data is not part of the Open Geospatial data. This Real Estate data is provided through the County Clerk's offices. Further information on the cost of this data is available on the following web page: Clerks Database Products DuPage County Parcel Data: NOTE: Field ACRE_SOURCE = 0 is Calculated, 1 is Deeded, NULL is unverified.