Presented is a system and method for monitoring activities of daily living, ADLs, of a person within an environment. The system comprises an ADL inference unit adapted to receive a sensor output signal representative of a detected value of a property of at least one of: the person and the environment, and to generate an inferred ADL output signal representative of the inferred ADL of the person. A monitor unit is adapted to generate a monitor signal dependent on at least one of: the received sensor output signal and the inferred ADL output signal.