There are a few factors that you should consider when trying to answer this question. The first is how often the carpets are vacuumed and how often they are walked on. If the carpets are vacuumed at least once a week, and there are not many people walking on them, then it may not be necessary to have them professionally cleaned. However, if the carpets are not vacuumed regularly or if many people are walking on them, they need to be professionally cleaned more often. Another factor to consider is what type of flooring is underneath the carpets. If there is hardwood or tile flooring underneath, it is unnecessary to have the carpets professionally cleaned. However, if carpeting underneath the carpets requires cleaning, then having the carpets professionally cleaned may be a good idea.