2300 sq feet is a nice size for a family of 4 or 5, assuming a functional layout (which I think you described). So, I still think it really doesn't have any defect that would make it a poor decision for you (and your dad) if you are ready to make a move/purchase decision at this time in your life.

Worthy.. our 18-year old decamps to the phantasy capitol of the world, Beautiful Downtown Burbank, California. Oh what will he do with his Canada Goose jacket! After finishing her degree in Tallahassee fl, the sunshine state, my daughter returned home and was glad that I kept her goose jacket and even the winter boots. Ottawa is indeed a miserable place in winter. Lol. Pbathome...so true about keeping an eye on the kids. We once had a 2 story walk out, so the teens had their bedrooms 2 floors below. Now they are well established adults, but Only recently did they tell me about their late night escapes out the basement door, through the back alley to 'hang' with their friends. I never would have dreamed my responsible teens would have done that.... Holly...."Heck, even when they were babies, I didn't mind. They weren't THAT far away, and I didn't get woken by every little fuss - just the ones that were serious enough to need to be addressed. ' My daughter uses a baby monitor and is very very sleep deprived. One devoted...."I love hearing the other 2 chatterboxes go nuts -- it took them soooo long to start talking.) What a touching comment.. I'm so happy for you! lazy-gardens...split bedrooms must be an American design, as it rare to see in Canada, And I have never seen a masterbedroom on main floor with bedrooms upstairs. Virgil..."Some are. Some aren't. Humans tend to have lots of different preferences and opinions. I could be wrong about that..." ah yes, we are all different. But I think it's wise to consider regional tastes when building my home. In my area I doubt that a home with main bedroom down would ever sell. Similarly, homes without basements are rare indeed.

Cpartist beat me to it. As drawn, the person sitting in the chair in the living room will be staring right at the toilet of the powder room and everyone who enters and exits. Yes, I know that chair is only a place holder, but just putting it there you should have noticed that. Everybody in the living room will still see people entering and leaving the powder room. It doesn't matter that you only plan to be there a few years. You have to sell that place one day and any problems you create will effect the price. A 'flex room' in a house that size is a sign that you can't figure out what to do with that space and gave up. Waaay too much wasted space that has to be kept clear for walking through and can't be used for anything else. Top floor: The door to the MBR is wrong. Why have an opening that large and then have the door swing block part of it? And I'd love to see the movers try to get furniture into that left dogleg into the MBR. The door in the MBR ensuite toilet cubbyhole is impossible. Question--Once someone walks in there, where will they stand when they try to close the door?? Do you really think that even kids can deal with vanities that tiny and closed in? Bifold doors cannot operate the way you have drawn them on the closets. They must pull out; otherwise there's no way to close them. Now: the deck. There's no access directly from the MBR to the deck. Why not? If anyone should have direct access, it's the grownups! And, oddly, the widest window in the house is awkwardly placed half over the tub looking out to that deck. This list above is all covered in Design 101 in Architecture school. Been there; learned it. Just as I would never spell 'everybody' as 'everybuddy', an architect would never make the above mistakes. Just like a writer knows the words 'casual' and 'causal' and knows the danger of using either incorrectly, likewise, an architect looks for clearance around every door before drawing a line and hangs doors with the correct swing automatically. Those just come naturally, like muscle memory. Hire an architect. And when the architect tells you that you don't have enough room for a powder room on the main floor, listen to him when he suggests that one of the kids' bathrooms should also have public access for that use. And especially listen when he says that both kids should share one larger bathroom. It won't kill them. Hire an architect.

I agree with @calidesign about the bathrooms. If you close up the door on the right of the master bath and convert the other one to a pocket door, you would have space for a nice, large shower, a double vanity and possibly a little extra storage space. For a guest/downstairs bathroom, I would remove the small closet from the 2nd bedroom (there's already a large walk-in in there) and bathroom door, and convert the doorway near the bottom of the stairs to a pocket door. By removing one of the doors and absorbing the closet space into the bathroom, you will have a more spacious bathroom with storage and room for a larger vanity with counter space. I don't think it's worth sacrificing kitchen space or master bedroom space to put in a guest bathroom upstairs, unless you have guests over a lot (in which case you could create a small bathroom on the left side of your kitchen, but you will lose valuable real estate). I honestly don't see anywhere else it could go upstairs without putting in obtrusive walls in your living room. You could narrow the foyer but because your ceiling are so high, I think it would end up costing a lot for just a small bathroom. Also, it would throw off the symmetry of your house quite a bit (looking at the entrance from the open space, one side would be open and the other closed off; the window would be off-center).