Make customized block and component families of outdoor equipment and furniture catalog for use in REVIT design software. Revit families? In simplest terminology, A family is a group of elements with a common set of properties, called parameters, and a related graphical representation. Revit families is a group of components used in conjunction and combination to build a model, for example, walls, windows, stairs, doors, bathrooms, fixtures, showers, etc., with a common set of properties, or parameters, and a related graphical representation. Different elements belonging to a family may have different values for some or all of their parameters, but the set of parameters (their names and meanings) is the same. These variations within the family are called family types or types.