Technically 'yes' but the end results are going to be baffling. Your counter tops and appliances won't sit properly (you will 'brick in' your dishwasher). Your doors may not close (it is unbelievably finicky to remove, trim and rehang doors...and expensive). And I won't even get into the BASEBOARD trim! Oy veh.

To do this properly (floating over top) is going to involve sanding/cleaning/priming/filling the tile. You must have FLAT and SMOOTH. Right. The cost = $2/sf. And if you leave it you will ALWAYS battle with it.

The professional way to deal with this (especially in a high-end neighborhood) is to jack it out and do everything the 'right' way. Cost of removing tile = $2-$3/sf...and once it is gone you never have to deal with it again. And the wall trim will look appropriate. The doors will be undisturbed...and you don't have to finagle the stairs (expensive and time consuming) and your dishwasher will fit properly without having to rip out the counter tops (it looks pretty tight right now...you don't want to play that game if you don't have to).

Leaving the tiles in place is for a quick flip in a poor neighborhood. Or for a low-rent property. This home doesn't seem to warrant the low-end treatment of leaving the tiles in place.

I can attest to what SJ McCarthy explains: the previous homeowner in the house I bought couldn’t be bothered with taking out old flooring before slapping another down. The flooring was so thick that the counters in the kitchen were ridiculously short, and yes: the dishwasher was bricked in! When I remodeled it took my flooring guys six days to jack out four layers of flooring before laying new tile. When all was said and done I found the interior doors and their jambs had been shortened as well! What a huge, expensive PIA to fix. If you’re not going to do the floors right, please just leave them alone. The future homeowner will thank you.

Rip out the ceramic, please. Did you not just say " High end neighborhood"? Don't "remuddle" as a former Houzzer use to say..................

Judging by just the two photo's you provided? Perhaps you hold on this, as you consider layout, pinched corners , and ........WALLS. From the looks of this, you may be rushing if even considering installing one floor over another. : )

All that tile needs to be removed the sub floor fixed and IMO it doesn’t matter what “they” say you do not apply this floor over ceramic not to mention the nightmare that ensues when your DW no longer fits just for starters. I will tell you those steps are going to cost big bucks to do right.Why do you have what looks to be 2 kitchens ? I would be working on the actul liveability of the spaces before thinkg about changing flooring.

Thank you all for your thoughtful comments! This house is a giant (not mine) and many oddities in the original. It was built in the faux Mediterranean phase of bigger is better. Wait til you see the rest of the challenges. In any case, thanks for stating all the traps of the ‘easy fix’.

Ah, I learned a new piece of information: Beneath the ceramic tiles, there is a well functioning hydronic radiant heating system. So jackhammering is not an option as we don't want to damage the pipes. I'm going to find an area where we can see what we're dealing with beneath the ceramic and how difficult they are to remove.

Oh no...the challenges are certainly piling up. You might be able to find some info on the John Bridge tilers’ forum:

https://www.johnbridge.com/vbulletin/showthread.php?t=73877

At first glance the process is akin to...surgery, making the sense of having an acre of floor to deal with a near reality.

Good luck!

Just updating regarding the existing ceramic tile floors. Owner found the plans: There is radiant heat in those floors (hydronic system with tubes embedded in gypcrete, and then covered with a thin amount of gypcrete). Tile sits on top of that. And the owner is dead set on having all the tile removed, even if it damages the radiant heat system. $$$

Oh this is not your house? This is for a customer of yours?

Belongs to a long time friend. I wouldn’t do this for money!