Control buildings can cause many problems in design because they can house big power, chemicals, diesel fuel and/or natural gas, dangerous fumes, and constant loud noise. Control building design begins with the floor plan. Generators, control panels, odor control systems, and many other components may all be housed in a control building. These components need to be arranged in a floor plan before any other design can take place. Any special foundation requirements and spill containment need to be addressed at this point.