An inside-mount countertop-range support for a flush-mount countertop range includes a counter bracket configured to be engaged to an inner edge of an opening defined within a countertop with a top surface. A base flange extends from the counter bracket and into the opening. The inside-mount countertop-range support includes a range having a housing and top member above the housing that extends over the opening and includes a bottom surface, wherein the housing is configured to be disposed within the opening. A range bracket is configured to be coupled to the housing and includes a top flange that is configured to be supported by the base flange, wherein when the top flange rests upon the base flange, the bottom surface of the top member engages and is flush with the top surface of the countertop.