Check the county GIS, depending on what system they use it can be really easy and helpful. Mecklenburg County, NC uses Polaris 3G which is pretty fantastic.
You can search by address, or street, or browse aerial photos and find all kinds of neat info (ownership, street address, topographic maps, and more).
An example of ours in action:
http://polaris3g.m...311&gisid=06504311