When it comes to parking, there is no such thing as a standard size. The dimensions of a parking spot can vary depending on the location and type of parking lot. For example, in a residential area, the average parking spot is 9 feet wide by 18 feet long. However, in a commercial area, the average parking spot is 10 feet wide by 20 feet long. There are also handicap-accessible parking spots that are larger than the average spot.