High Quality Content by WIKIPEDIA articles! San Diego has over 140 high-rises, mainly in the downtown district. In the city, there are 30 buildings that stand taller than 300 feet (91 m). In the 1970s, the Federal Aviation Administration (FAA) began restricting downtown building height to 500 feet (152.4 m) due to the proximity of the San Diego International Airport. The tallest building in the city is the 34-story One America Plaza, completed in 1991, which stands 500 feet (152.4 m) tall.