Design system for assisting in the design of a layout of a kitchen and comprising: - a plurality of objects for representing in a reduced size a plurality of elements for the layout of said kitchen, said objects all being at the same reduced scale with respect to the elements of the layout; - a support comprising a surface, of which at least one portion is able to support said objects; - a computer comprising: • a position determining means, said objects and said position determining means being configured in such a way that the latter is able to determine a position for each one of the objects placed on said portion; • a converting means for converting an item of position information of the objects placed on said portion into an item of position information in said kitchen of the elements of the layout represented by said objects; - a layout determining means for determining a layout project of said kitchen based on the position information of the elements of the layout in said kitchen obtained by said converting means and based on at least one technical constraint of a kitchen layout, said layout determining means being able to impose at least one additional layout component (43; 44; 45; 46) in said layout project of said kitchen based on said at least one technical constraint; - an output means for supplying information on the layout project of said kitchen determined by said layout determining means, said information comprising an item of information on said at least one additional layout component (43; 44; 45; 46) if the project comprises any, said information on the layout project and said layout project comprising: • a plan indicating a position in said kitchen of the elements of the layout, and, if the project comprises any, a position in said kitchen of the additional layout components (43; 44; 45; 46); and/or • a list of the elements of the layout, and, if the project comprises any, of the additional layout components (43; 44; 45; 46). - a plurality of objects for representing in a reduced size a plurality of elements for the layout of said kitchen, said objects all being at the same reduced scale with respect to the elements of the layout; - a support comprising a surface, of which at least one portion is able to support said objects; - a computer comprising: • a position determining means, said objects and said position determining means being configured in such a way that the latter is able to determine a position for each one of the objects placed on said portion; • a converting means for converting an item of position information of the objects placed on said portion into an item of position information in said kitchen of the elements of the layout represented by said objects; • a position determining means, said objects and said position determining means being configured in such a way that the latter is able to determine a position for each one of the objects placed on said portion; • a converting means for converting an item of position information of the objects placed on said portion into an item of position information in said kitchen of the elements of the layout represented by said objects; - a layout determining means for determining a layout project of said kitchen based on the position information of the elements of the layout in said kitchen obtained by said converting means and based on at least one technical constraint of a kitchen layout, said layout determining means being able to impose at least one additional layout component (43; 44; 45; 46) in said layout project of said kitchen based on said at least one technical constraint; - an output means for supplying information on the layout project of said kitchen determined by said layout determining means, • a plan indicating a position in said kitchen of the elements of the layout, and, if the project comprises any, a position in said kitchen of the additional layout components (43; 44; 45; 46); and/or • a list of the elements of the layout, and, if the project comprises any, of the additional layout components (43; 44; 45; 46).