I have a dedicated darkroom and use an Omega DII enlarger. The enlarger is bolted to a corner counter that rests on cleats attached to cabinets on adjacent sides of one corner of the room. I used prefabricated cabinet kits that camer from Lowes with a horizontal cleat added to the side of each of the cabinet facing the corner, and also horizontal attached cleats to the short sections of wall between the cabinets and the corner. I made my counter from particle board that I simply varnished, but it would be a simple matter to use a plastic laminate instead. To complete the installation, I cut another scrap of particle board to fit between the two cabinets, just under the front edge of the particle board counter. This was attached to vertical cleats on the sides of the cabinets, and supports the front of the counter.
The result is very sturdy - I have actually stood on it while hanging a safelight up on the ceiling.
Using a kitchen as a darkroom adds the (possible) additional requirement that the space has to be fully usable as a kitchen as well as a darkroom, and since kitchens are gathering places at parties, there probably is a desire for the installation to be attractive as well as functional. Depending on the layout of the kitchen, I would think that it might be possible to do something similar by adding one additional section of kitchen cabinet.