Is privacy an issue?

No. Both windows are on the side of the house. They face a tall hedge.

What does your architect suggest?

I don't trust my architect's opinion on anything design related. I've learned that we don't have similar taste. I trust him on the structural elements but not the visual/aesthetic. Its unfortunate but that is why I'm here on gardenweb! I do have a designer helping with the project who is very good, but she is also very expensive. I just went over a bunch of things with her yesterday but we didn't cover this detail.

There is no normal. Many factors determine window size and location: light, orientation, ventilation, view out, view in, moisture, exterior elevation composition, personal preference, and more.

Even with the hedges, I would want the bottom higher -- low enough to see out but (no other way to say it) no lower than boob height! Lower than about 52 inches would be uncomfortable for me. How would square windows look on your exterior? 36" or 32" square windows might look nice depending on the style of your house.

So the window in the shower is in our kids bathroom and we have 3 boys. So I guess I wasn't as worries about that! And the one in the toilet area is not right next to the toilet... but I could consider 36" square windows. I think 36" square windows would look ok from the exterior. This is the only window in the boy's bathroom so I want to make sure it gets a good amount of light. The square window would be 54" from the ground. The window is north facing.

"I don't trust my architect's opinion on anything design related:

Unfortunately, an entire house or renovation is "design" related. If you do not trust him why are you employing him?

I've already mostly paid him. I did consider switching again as I have a friend who is an architect but it's not possible. I have a great interior designer who has interior architecture skills and pay her hourly for help. For instance, yesterday she designed the beam layout in the great room (and her design is better than what my architect drew).

I already changed architects once and am not confident I could find someone better. This architect had done a lot of homes in our area and seemed to be one of the best here. Overall I am happy with the design. its not that he is bad at design, but I definitely need second opinions. The designer has made a lot of changes that I like.

My husband agrees with mojomom - Must cover up to boob-level!

Originally I was OK going a bit lower to keep aesthetics, as long as the 'lower bits' were covered. I figured I could just add blinds to that window (so guests could keep their privacy) but I compromised in the end, as our bathroom is on the side of the house and shouldn't see too many peeping toms.

I just mocked up a few options on the wall using painters tape. I think I like the 32"x42" window which ends 48" from floor. The square 36" window (ending 54" from floor) looked bizarrely high.

We have a window in our master bathroom that is quite large and is only 24" from the floor. It's on the side of the house and faces our neighbors driveway. We will be building a tall privacy fence and installing privacy blinds. In hindsight, I wish we would have done glass blocks or a very high window only just for light.

The guest bathroom has a window in the shower. I'd say the bottom is 4-5' from the floor. This one won't get used much and on the 2nd floor with no worries of anyone seeing in.

I'd try to avoid a clear window -- or any window -- in a shower. Is this the only place for a window in this bathroom? Is a skylight possible?

Our MBA has two matching windows (guessing 28w X 44h) on a side wall. One is beside my DH's sink, with towel bars below it, and one is in the toilet room. They are 52" above the floor.

We have 9' ceilings, and most windows in our house are 28" above the floor.

We needed no shades in our MBA until a two-story home replaced the ranch next door. We installed 'up/down' shades. The lower third is permanently raised, and we close the sink-side shade entirely when anyone will be nude in the bathroom.

We've decided on 32x48 windows. The header height will be 7'6" so they will end 42" from floor. We plan to use frosted glass in the lower half of the window in the shower.

Do not put a window in a shower unless you want to invite rot and mold into the interior of your walls. Yes, there are correct ways to do it, but they all involve truly knowledgeable and expensive craftsmen. But, since there seem to be way more out there that do it cheap and wrong, rather than do it right, you're assuming a giant risk. When you could just design the risk away. The track record to date on this project would not inspire enough confidence that it could be done correctly. Stick with the safer option.

I love my long window, 48"x24" glass size,hung at five ft for privacy near my toilet in my master bath. For my shower , I placed a standard 6/1 window next to my shower rather than in it and a high 36 round window place 8 ft off the floor, ceiling is 12 ft at highest point, a cross from the shower so with the glass enclosure I have the benifits of a shower window, i.e. Light and view out, without the waterproofing potential problems.

In our daughter's bathroom, we are planning a 36"x24" window by the vanity set at 5' for privacy & natural light. Not built yet, but I'm very happy with that decision.

We have windows in the bathroom. For architectural aspects (outside appearance), ours set about 50" off the floor. The side effect of this is that even if someone could see in, it's below where we're really concerned. I'd definitely make sure it (and your window trim) are above the tallest toilet you'd consider.

We don't have a window in the shower, but I have had one in a previous house. It's kind of pleasant in my opinion and we really didn't have all the issues people complain will happen.

My new master bath will have no windows, but it will have an operable skylight in the ceiling and the shower has three columns of glass block in it. Most are translucent but we put a row at eye level of transparent ones so we can look out.