What are the rules for a detached garage in Southfield?

In single family districts, Southfield permits one or more accessory buildings, including one detached garage. The accessory building height cap is 15 feet. The total gross floor area of all accessory buildings cannot exceed the smaller of 10 percent of the parcel land area or the ground-floor area of the principal building. No portion of an accessory building may be within 3 feet of a side or rear property line, and corner or through lots have extra limits.