Residential real estate is broadly defined as real property (land and any buildings on it) used for residential purposes—the most common example being single-family homes. Residential property is usually owner-occupied, but not necessarily. Homeowners can rent out their residential properties for passive income or live in them and sell the properties for a profit when home prices increase. Multi-family houses as duplexes and fourplexes—dwellings with two or four units, respectively, are very popular with Investor Buyers to generate revenue.