Don't know where to post this, really. I'm working on my laundry room, but it would apply to kitchens or any desk area. For a countertop where you're working sitting down, how high above the countertop/desk surface can you mount a cabinet?

My Laundry Room has a sitting space for folding clothes. Counter is 22" deep. I need to put 12" deep cabinets above the counter. So, my questions:

1) Do I need to allow for head clearance while seated?

2) Do I need to allow for head clearance during that transition time between sitting and standing--which would mean allowing for one's total height? (If yes, that makes the cabinet shelves unreachable for me except for the bottom shelf.)

3) Does it make any difference that my counter is only 22" deep rather than the usual 24" or more?