There are three main risk/reward classes of multi-family properties: A, B, and C. Class A properties tend to be higher end condominium with premium amenities such as pools, gyms, and 24/7 security services. This class tends to be lower in risk and have the lower opportunity for big yields. Class B properties are the middle ground, duplexes or condos in good neighborhoods with basic amenities. Class C properties have the highest risk/reward potential, and are usually older properties in less desirable neighborhoods that may just be starting down the path of revitalization.