There are many different reasons why elevators are installed in buildings. It could be that it is required by code, or it could be that the building is used by a large number of people with physical conditions that benefit from the use of an elevator. No matter what the reason, however, you should make sure that your elevator is safe and easy to use for anyone visiting your building.
Elevators need to have regular inspections and tests. You should check with your local Department of Buildings or equivalent to see what the requirements are. This will ensure that your elevator is in good working order. You should also be attentive to any complaints from tenants and visitors. Unusual noises and behavior could be signs of a serious problem. Usually, spending the time and money on preventive maintenance will save you a lot of problems later on.
Keeping your elevator clean, as well, will usually take some extra work, but it will give a better impression.