I have a very small powder room off my kitchen hallway, and it's 5'1" by about 41 or 42 inches wide. Not much more than a closet, really! So yeah, it's feasible, if problematic. I'd kill for your extra six inches in width! A lot of the older houses around here have half-baths directly off the kitchen like you describe as their only main floor bathroom. I know a lot of people nowadays find a bathroom right off the kitchen unpleasant, but weighed against no bathroom at all on the main floor, I think a bathroom wins! I think it makes a big difference which way the 4x6 is laid out, and where the doorway would be. A big problem with my "closet bath" is door clearance. I'm in the process right now of wainscoating and replacing the toilet and sink, and it was very difficult to find a modern sink with a depth small enough to allow me to close the door. Would you be able to do pocket doors? I don't have enough wall on either side to do that, but that would make your space much bigger and more accessible.

Here are some resources on sound-reducing construction. The one immediately below, and the one that is hyper-linked, look pretty good. The other one (''Suppressproducts'') might just be an advertisement for their products, I am not sure. Basically sound is vibration that is transmitted from the source to your ear by rigid materials (sound travels well through hard materials like wood) and air. To reduce sound, you want to reduce the transmission of vibration. Air gap is better than a rigid connection. A heavy, soft material (e.g. rubber) is better than an air gap. Techniques are: - Double layers of drywall with dampening material like the referenced ''green glue'' between them (not simply screwing one sheet of drywall to the other) - Staggered studs w/ separate floor plates (essentially making two walls, no physical connection from one side to the other) - Sheet of sound dampening material between the staggered studs (reducing sound transmission through the airspace) - Sealing openings in the walls (electrical boxes, holes for plumbing, gaskets around and under door frame) - Special doors, or (less good) a conventional solid door, or (maybe an in-between alternative) a conventional door w/ a sound dampening layer on one side. - Dampening material between subfloor and joists, and between ceiling drywall and joists - Sound-proofing paint (I've not heard of this stuff before, I am skeptical it does much) Since the bathroom is a small space, you can use these techniques without too much additional expense, and just the loss of about 6'' if using staggered studs and double drywall layers. http://www.soundproofingcompany.com/index.php?/library/articles/elements_of_room_construction http://www.supressproducts.com/soundproofing-articles/Soundproof-Sheetrock.html Here is a link that might be useful: Link

Is this the picture? [Contemporary Powder Room[(https://www.houzz.com/photos/contemporary-powder-room-ideas-phbr1-bp~t_713~s_2103) by Hallandale Interior Designers & Decorators 2id Interiors If you are inspired by this picture, I think going with anything dark just because the floor is dark will give you a completely different look. I would still go with the light colors with the existing dark floor.

True. I do feel that some have gone overboard in expressing their feelings, to the point of perhaps being inconsiderate of the the feelings of others. I'm the one who initially pointed out that some people are "wired" to be easily perturbed by this sort of thing, but I never read that they had no choice but to get overemphatic at a rare opportunity to express their feelings. (This subject must some psychological connection with the taking-off-shoes-in-the-homes-of-others issue, another one that leads some to get a little carried away.) Note, please, also that that bathroom door is on the other side of the home's central hall--and has its own door. It's very highly unlikely to be a code violation. Energie, I think your initial question was answered, right? :) IMO, the answers on this thread definitely overstate the negatives--to you. As others who've lived with bathroom doors right in the kitchen have said, they don't feel they're a problem worth getting excited over. I agree. If I had one, I'd paper it with red and white flying pigs so people would smile when they saw it.