You can do that, but if the 42" high countertop is going to be workspace, it will be ergonomically uncomfortable unless you are well over six feet tall. If you believe it won't be a problem, perhaps create a 42" high platform on the kitchen counter and fold a couple loads of laundry on top of it, in order to test drive that height.

I have no idea how intake airflow for the dryer would be if the planned cabinet door is closed while the dryer is operating. If it affects that, keeping a cabinet door open while the dryer is running could be a traffic hazard.

Then there is the question of which way the dryer door opens vs the cabinet door, especially for future dryers or buyers of your house.

Sometimes, over-customizing hurts resale value of a home.

Thank you both. Very helpful answers!. @Cavimum: I will consider not closing a door over it, very good point. @flygirl519 thank you so much for the photo and for having a counter that height haha that helps my brain so much!

The first thing to understand is you need to do this for ease of access to the water cut off and also for service. It looks great in pictures but honestly in reality it really often does not look as clean as you might think. I certainly would not do doors in front of a W/D ever and you need to post pics of your space . I like a counter above them that can be lifted out to access water and for service and how it looks comes second. 42” is bar height and quite comfortable for folding clothes unless you are really short.

I agree @Patricia Colwell Consulting that having an easily removable top is essential to be able to access shuts offs, pull out the machines when necessary etc. etc. I placed my counter on two side supports and one in between mid way under the top. and placed an L shape piece of trim at the back to hide some of the laundry hoses etc. But it is a laminate countertop so its not super heavy. Not sure Alison what you are planning for a counter top but in the application I used I think a stone of some kind would be too heavy.

Thank you for these helpful perspectives, everyone! @PatriciaColwell I never considered maintenance or possible future replacement that might require us to have to burst open our vanity! Haha That could have been a horrible oversight! @flygirl19 that is helpful, thanks. Our sink was supposed to be beside it so I have gone back to the drawing board. Trying to decide how to creatively put a maneuverable countertop on it. Good food for thought. We are leaning more towards just changing the whole idea, and getting pedestals and just putting them on a different wall. Thanks everyone.

75 Beautiful Laundry Rooms In Closets Home Design Pictures & Ideas - March, 2021 | Houzz

alison there are lots of ideas on this site you may or may not have seen.. With sliding doors or doors with mesh for air to escape you can create a nice look in a laundry in a small space. I would have put sliding doors on mine but the machines are not only tall but much deeper than the original laundry space and I would have had to build out the nook. Not there yet but Id love to see yours and the space you are working with.