The frequency and amount by which a landlord can raise rents can vary depending on your location. For example, the city of Los Angeles has a Rent Stabilization Ordinance (RSO). This ordinance protects the tenant from excessive rate increases, but also allows the property owner to increase the rent a reasonable amount. In Los Angeles, property owners can raise the rent 3 percent once every 12 months. There can be variables as it relates to the Consumer Price Index. Once a tenant has left the property, the landlord can charge any market price for the next tenant, but once the property is occupied, the same rent hike rules apply to the new occupant.