G-Flats, short for Granny Flats, is a colloquial term commonly used to describe an Accessory Dwelling Unit (ADU)—a smaller, self-contained residential unit located on the same property as a primary residence. A granny flat may be attached to the main house, converted from an existing structure such as a garage, or constructed as a detached building. These units typically include their own kitchen, bathroom, sleeping area, and living space, allowing them to function as independent dwellings.
The term originated from the traditional use of these units to house aging parents or other family members, but modern granny flats serve a much broader range of purposes. Homeowners may use them to accommodate adult children, guests, caregivers, or tenants, or as a source of rental income. As housing affordability and density concerns have grown in many communities, ADUs and granny flats have become increasingly popular, leading many local governments to revise zoning and development regulations to encourage their construction.
