There are several different classes of self-storage facilities, which are typically defined based on the level of amenities and services provided, as well as the condition and age of the facilities. The main classes of self-storage facilities include:

Class A: These facilities are considered top-tier self-storage properties. They are typically new or recently built and offer a wide range of amenities such as climate control, 24-hour security, and easy access for customers. They are also typically located in prime, high-income areas.

Class B: These facilities are older than Class A facilities and may not have as many amenities but are still well-maintained and offer basic services such as drive-up access and security. They are typically located in middle-income areas.

Class C: These facilities are considered the lowest tier of self-storage properties. They are typically older and may not be as well-maintained as Class A or B facilities. They may not offer many amenities and may be located in lower-income areas.

Climate-controlled: These facilities are similar to Class A facilities, they can control temperature and humidity inside the units. They may have added security, electronic gate access, and surveillance cameras.

It is important to note that these classes are generalizations and there may be variations between different self-storage facilities. Additionally, there are also portable storage container companies that are considered a different type of self-storage option, where containers are delivered on-site for customers to store their goods.