Although it may seem counterintuitive, a family business renting space to the family’s private foundation, even at below market rates, is considered an act of self-dealing, unless the space is leased to the foundation for free.
Self-dealing involves a complicated set of rules to prevent most transactions between private foundations and their insiders, known as “disqualified persons.”
Read more in the Exponent Philanthropy publication How to Avoid Self-Dealing.