The strategy of investing in properties that house two or more households. Multi-family, also known as multifamily, may include duplexes, triplexes, quadplexes, etc. as well as larger developments such as apartment buildings and condominium buildings. Multi-family investment strategies often mimic single-family strategies at scale. These properties may be flipped, held, upgraded, and creatively financed, but they may also be subject to additional regulations.