Currently, Blender lacks the use of feet and inches. However, I found a way through which i can utilize the cumbersome English system i have been thought with relative ease.
In my scenes, one blender unit equals one foot. In order for 12 inches to equal a foot, the grid needs to be set up with 12 divisions. Select the "View" menu in any 3D view window, choose view properties, and change the grid divisions to 12. Now, one foot is divided into 12 inches.
To utilize this setting without bothersome decimals, change your pereferences to snap to the grid. This can be done by dragging down the top main menu (user preferences) and selecting the buttons under snap to grid.