The accessory dwelling unit must meet all zoning development standards, such as setback, lot coverage and height restrictions, when increasing square footage or adding a new detached structure; and accessory dwelling units must meet all building code standards adopted by the city, including building, electrical, fire, and plumbing code requirements (conversion of existing legally created on-site accessory structures such as garages to an ADU that do not meet setback requirements are exempt from meeting setback standards).