Most real estate firms are relatively small; indeed, some are one-person businesses. By contrast, some large real estate firms have several hundred agents operating out of numerous branch offices. Many brokers have franchise agreements with national or regional real estate organizations. Under this type of arrangement, the broker pays a fee in exchange for the privilege of using the more widely known name of the parent organization. Although franchised brokers often receive help in training sales staff and running their offices, they bear the ultimate responsibility for the success or failure of their firms.

Real estate brokers and sales agents are older, on average, than most other workers. Historically, many homemakers and retired persons were attracted to real estate sales by the flexible and part-time work schedules characteristic of the field. These individuals could enter, leave, and later reenter the occupation, depending on the strength of the real estate market, their family responsibilities, or other personal circumstances. Recently, however, the attractiveness of part-time real estate work has declined, as increasingly complex legal and technological requirements are raising startup costs associated with becoming an agent.