This is what's currently in my laundry room. The door to the room is on the wall on the right side of the drawing.

I want to add a countertop above washing and dryer machines so there isn't a gap in the back thats easy for things to fall into. There is also about 15 inches to the left of the machine for a cabinet.

The dilemma is should the 15 inch cabinet be:

a. the height of the existing countertop and we extend the counter top to an L shape

or

b. the height of the countertop for the machines ~40 inches tall.

I know I have to make custom cabinets in both cases since they would need to be nearly 30 inches deep.

Not sure which one would look more natural.