Some Tudor homes featured upper stories that were larger than the ground floor. This was referred to as a "jetty," and it occurred when the higher stories overhung. The jetty's origins are unknown, but in a town, it was highly beneficial for increasing floor area while maintaining maximum street width. It could also be used as an additional room or office. There are two theories on why the jetty was added. Some historians believe it was done as an improvement because it provided more living space. Others think it was used for housing servants who worked at the top of the house. The jetty was not needed on farms because there was no limit to how wide the streets there could be. It was common for farmers to build their own houses rather than hire contractors. They would cut down trees on their land and use them for timber before they grew old enough to sell. On average, cities' streets became wider from 15-20 feet to 60-80 feet after the jetty was built. This means that you can drive down the street without hitting a wall even if there are other cars parked along the curb. Well-to-do people also had gardens on their roofs where they could grow vegetables or flowers. These were called "roof gardens." Cities with jettyts include London, York, Southampton, and Portsmouth. House styles include Gothic, Renaissance, and Classical.