There is nothing illegal for a person to have more than one rental for a residential unit in his or her name.In fact it happens all the time. Examples would be when a person spends a lot of time in some other city besides his or her main residence on business. In such a situation, that person could be renting his or her main residence and have a second rental for business purposes.If you have two units that you are renting, perhaps you might consider subleasing the first unit to some third party since you are not using it.