In Philadelphia, the C-2 zoning is applied to every corner property in the southern section of the city.
When these homes were built post wartime, the model for the neighborhood was for the corner stor, hair place, what have you to occupy these buildings with a business on the first floor, and a home on the second floor.
Recent decades of course have called for larger and larger homes, we do our shopping in malls or supermarkets, and the way of the corner business has largely gone to the wayside.
With that in mind, the city recently announced they were revamping the entire zoning process and designation, because to build anything here, you almost always have to have a variance, which is nearly always granted.
My point is, that many of these zoning regulations are outmoded in some areas.
For your area, you need to KNOW the neighborhood to make the HABU decision. When I first started appraising, I would absolutely panic as a trainee when I saw C-2.