As for the front yard, no significant change to the facade of the house is allowed. But taking a drive around most residential areas reveal many home owners do not heed this requirement. If there is an extension to the front part of the house, there must be at least 20 feet from the wall of the facade to the gate of the house.
Hence, there isn't much you can do to a 20x60 house, unlike the 22x75 where you can normally extend the backyard by 10feet and the front by a further 5-6 feet. These extensions add significantly to the size of a 22x75 house.
In the next Episode, I'll talk about the process and procedures around getting approval for the renovations.