AutoCAD Civil 3D

[#1]

Is there a way to have certain figures auto-hatch upon import?

[#2 · Accepted solution]

You can set up the figure prefix database so that figures with certain names will be defined as lot lines.   When importing into the drawing, lot lines that form closed areas will define parcels. 

Set the default parcel style to have the parcel area fill component visible.   You may also need to clear the Observe fill distance option on the Parcel Style Design tab.