Setbacks depend on the zoning of the parcel in question. Typically, for principal structures, there is a 25 foot front yard setback, 5 foot or 10 foot side yard setback, and 25 foot rear yard setback. For corner lots, there is a 10 or 25 foot corner side yard setback. Accessory structures have different setbacks then principal structures. Many times these setbacks will be altered by overlay districts.
Please contact Zoning at 757-664-6588 to verify setbacks for a specific property and structure.