This invention relates to a built-in electrical household appliance (1), suitable for being housed inside a built-in furniture unit (2), the furniture unit comprising a lateral wall defining a surface (4) and a unit door (6) attached to said lateral surface (4) by means of hinges (10a, 10b). The appliance (1) comprises: a main body (12) defining a space for housing foods or objects, the main body having a side (13) suitable for being placed facing the lateral surface (4) when the electrical household appliance is housed in the furniture unit; a door (11) for access to the space and hinged on one of its sides to the main body (12) in such a manner as to rotate between an open position and a closed position and in such a manner as to present, in the closed position, a lateral edge (25) thereof facing the lateral surface (4), and being provided with attachment elements (26) suitable for permitting coupling to the unit door (6), in such a way that it is possible to open and close the door by moving the unit door (6), The appliance furthermore shows a distance between said lateral edge (25) of the door (11) and a plane containing an outer surface of said side (13) of the main body (12) there is a distance, in a direction perpendicular to said plane, of at least 5 mm, such that when the electrical household appliance (1) is housed in the furniture unit (2) the side (13) can be arranged adjacent to the lateral surface (4) while the hinges (10a, 10b) can be accommodated in a space between the door (11) and said lateral surface (4) of said furniture unit, and the door (11) has, along the lateral edge (25), at least one vertical chamfer (22) to avoid interference with the hinges (10a, 10b) when the door is operated.