There are three main categories of membership in BOMA St. Louis:
- A regular member must represent a building or buildings, be employed in the ownership, operation, management, or leasing of a building or buildings, or be employed by an owner or a firm engaged in the ownership, management or leasing of a building or buildings. A regular member may vote at all meetings.
- An associate member shall be a representative of an industry supplying goods or services to buildings represented in BOMA St. Louis.
- A professional member shall be a member of a professional firm (i.e. lawyer, architect, CPA.)