Personally I wouldn't want a washer and dryer in my kitchen.

Separate laundry is much more important and appealing to most buyers.

I do not see the value of a first floor shower unless you have a bedroom on first floor.

No to shower/sauna on this floor. Washer dryers are common in kitchens in Europe and some other countries. Not the custom in U.S. a sketch of your floor plan would help us give you ideas. Use black ink so it is readable when posted. Some photos of the area from as far back as possible helps. No panoramics.

You’ll have enough challenges fitting just a toilet and sink under a stairs within the code required clearances. A steam shower is a turnoff for most people to begin with because they are usually so badly built that they cause water damage. Plus that’s adding an extra 10K to an already 20K bath project that is questionable to begin with.

Would you downgrade your laundry for a steam shower?

No.

A steam shower would be nice, but not at the expense of a good laundry space. But of course you are asking this partially in a forum where people discuss laundry beyond the average users. Maybe ask in the real estate or building a home forum for other views as that seems to be a spot for an unbiased view, or maybe a better view from a financial decision.

To some extent, the laundry issue depends on where you live. In the US, it seems to be common to have the laundry upstairs, near the bedrooms. In Europe, it's often in the kitchen. In Australia, it's near the door out to the clothesline. I think you need to decide what is most functional in your sitation.

Regardless, forget the steam shower. Expensive, but worth nothing when it comes to resale value. And an ordinary shower on the ground floor only makes sense if there's a bedroom there.

Are you panting for a steam shower and would you use it enough to warrant the expense - especially if it is located downstairs away from your bedroom. My understanding is that a steam shower done correctly adds at least $10,000 to the cost of a shower - and a good shower done correctly even without steam is not cheap.

I don't think most people would really want a shower especially if it means the washer and dryer are literally in the kitchen - which means that the laundry would be done in the kitchen.

I don't live in suburbia - nor did I grow up in suburbia - so the homes I've lived in and those of my friends generally were built before washer dryers were considered to be essential home appliances so none of them have the luxury of a dedicated laundry room - which you currently have - or at least some version of that. So I am not coming from a place where I must have a dedicated laundry room - but all things being equal I would want a space for my washer dryer where it is in plain sight - so that laundry waiting to be folded; laundry baskets or whatever added to the clutter of my family's living spaces - even a closet would be better.

Bad idea for resale. Most buyers won't pay extra for the steam shower and some may see it as another thing that breaks.

have a stacked full-sized pair in a closet in a small hall off the main part of my kitchen, so that all essential functions are on one level. A bathroom and bedroom (my office) are off the hall as well. I have to be very organized to keep the area from being messy - and there are only two of us.

I recall seeing a photo that had a washer and dryer in a very nice kitchen. I was taken aback by the intensity of the negative reactions in the comments. The revulsion was well beyond lint and clutter in the kitchen. Now I get it. It's one thing to pre-soak icky stuff in a bathroom sink that only I use. Doing it in the kitchen sink would not be acceptable.

yet, many people plan their washer and dryer in a mudroom near the kitchen...

No, I would not, especially if that meant the washer and dryer in the kitchen -- as a buyer, that would be a total turn-off. You'd be better off moving the laundry to the basement, if you have one, or the garage, rather than the kitchen -- but not for the sake of an additional shower. *A lot* of middle-aged and up buyers put a high priority on a first-floor laundry (d*mn aging and all that).

Seriously? Without seeing a hard plan , a demo plan, etc. ? All anyone can say is under the stair is good for almost nothing but infrequently accessed storage, or bookshelves. The fact that it "juts" into the living room already tells you too much is crammed in there. No.......I don't want laundry in a kitchen. Neither does anyone else. Give better info in the form of drawings and dimensions and photos.