There is no reason why you cannot install a dishwasher next to an oven, but why would you want to have so much heat in one area. Installing the dishwasher away from the oven will allow the heat dissipate much faster. If the oven and the dishwasher are on separate circuits, you could install them next to each other. The only problem you may have is the space needed between the oven and the dishwasher. If you install them together, you will need to have a gap in between to allow the heat to escape.

If you place them on opposite sides of the kitchen, you will not have a gap between the two, which can take away from the smooth look of the kitchen cabinetry. There is no reason why you cannot install them together, but there is logic to why you should not install them side by side. The electrical wiring for the dishwasher and the oven is going to be separate because they each use so much power. You will need a circuit for the oven and one for the dishwasher so you might consider separating the appliances and keep your kitchen looking and operating smoothly.

In a typical kitchen, you will have an oven, refrigerator, dishwasher and maybe a trash compactor. If you place the dishwasher and compactor near the sink, you will have a more efficient operation. The refrigerator and oven can be placed on another wall away from each other. Keeping the appliances away from each other will keep the flow of electricity through the kitchen evenly distributed. It is important to keep the kitchen appliances operating correctly without wearing on each other. Any appliance that gives off heat such as a dishwasher and oven should not be place near the refrigerator. This causes the appliance to work harder to stay cold.