The invention relates to a method for assembling a wall (1) of a desired wall thickness from panels (2) and at least one stile (5) connecting the panels (2), comprising determining the dimensions of the connecting stile (5) in wall thickness direction and subsequently arranging at least one recess (3) receiving the connecting stile (5) in each of the panels (2) at a chosen distance (D) from the visible side (8) thereof, wherein the distance (D) from the visible side (8) is determined from the desired wall thickness and the determined dimensions of the stile (5) at the position of the join. The invention further relates to a system for assembling a wall (1) provided with at least two panels (2) each having at least one recess (3) at a determined distance (D) from their visible side (8), and at least one stile (5) having flanges (4) co-acting with the recesses (3) for mutually connecting the panels (2) and having determined chosen dimensions in wall thickness direction. The system and the method according to the invention make it possible during the construction of a wall to compensate tolerances in the dimensioning of the panels which occur during manufacture thereof, so that a wall results with precisely determined thickness and exceptionally flat visible side.