I guess the first thing would be to change the floor , I would probably use vinyl plank in a gray tone. I assume all the cabinets and appliances will go and all the furniture also. You really need to give us a little more info. For instance how many staff . Just hair or are you going to also have nails, Is there enough space on your electrical panel to add hair dryers , all the plumbing will have to be redone for sinks . What do you mean by upscale? This good run into big $$$$ if that is what you want. You will need many permits starting with can you actually have a salon in your home at all.

Congrats on the new business. I was wondering tho, have you checked your local laws and restrictions about in-house businesses? Just curious because I know of two people, one who ran a gift shop in her house and my BF who had a music store in her "music room". Eventually they ran into trouble with town authorities stating it was against the law (?) to have both a home and business combined in one structure. I'm probably not stating it correctly, but that was the idea. Both had to discontinue the businesses or have a separate building for it. My BF remodeled her garage to accommodate the music store.

So my suggetion is to google trendy hair salons for tons of ideas . We would need a lot more info like a floor plan , dimensions this really needs a designer that specializes in salons to help.

I love in-home salons! Don't know why, maybe it was my Aunt Ruth the hairdresser, or maybe it was Trudy in Steel Magnolias LOL. Having worked in spaces with all kinds of convenience and all kinds of inconvenience, I would strongly recommend keeping every cabinet, sink, fridge, and microwave space that you can. It's looks and sounds like a fun project, please post pictures as you go!