A private garage (which may include a carport) for vehicle parking and household storage that is accessory to a dwelling is allowed within the rear setback, provided any vehicle garage door is set back a minimum of three feet from an alley and provided the following additional requirements are met:
A. The garage structure shall not exceed 25 feet in height.
B. The garage shall not exceed one story, except a second story may be used for household storage.
C. A garage that is larger than 600 square feet in building floor area shall meet the principal building setbacks.