First and foremost - what are your plumbing facilities and where are they located. This may have a large effect on what you are able to do.... I have transformed a bedroom to a bathroom and some creative returns and plumbing were required. Also are you intending to add a toilet?

I think the first layout is fine. You might want to consider moving the door for the storage room of the master bedroom so that it opens into the hall. That way the kids can use it for overflow storage. Also, that hallway is big enough that I think it could hold a large armour, providing more closet space. (There's no need to sleep in the same room as your clothes, so long as they're not too far off.) Also, don't forget that while the drawing shows kids in double beds, this need not be the case, so there will be more room for furniture (dressers or whatever) in their rooms. Finally, that step to bedroom 4 will not be odd at all. I've seen it in other homes. It looks clumsy in the drawing but it isn't. What you'll see when you come up the stairs is a bedroom door on a slight diagonal. It's only an odd jagged step if you walk like a robot, in straight lines along the wall, which is what your eye is doing on the drawing but you won't do in real life.

You have a good nice project planned here, with your kitchen now a part of large living space. Here, though, are some cautions and suggestions. Your extra-large peninisula counter and full window wall over the sink seem to be features that you like and want - but they also cause some problems with this plan. If two people are ever in the kitchen, one will be trapped there. And even for one, the peninsula forces an irritating hike around it to the table for serving and clean-up. Table and array of counter stools are uncomfortably close together, creating congestion especially when occupied. And while your back wall may well contain a fridge, wall ovens, pantry and cook-top, it would just barely do so - and leave no other space at all for counter. This, together with your nice bank of windows on the outside wall leave no space at all for upper cabinet dish storage. I agree with Laurie that an island here would be much preferable. I would put the sink and dishwasher on an island, with fewer stools, and some mid-height dish storage - letting gatherings of more than two or three enjoy the table in a conversational arrangement instead of facing away from the room in a row. I would also minimize the window array a bit, and extend the kitchen toward the dining table window a foot or so - and put the wall ovens at this end of the "L" - with no side wall at the left. This would distribute your countertop space more happily among your work stations, allow for some upper cabinet storage, and make the kitchen feel more part of the nice big room, instead of separated from it by the peninsula. Perhaps a careful in-person visit with a kitchen designer would be wise before you build this fun new addition. Good luck! Mark

Janedoe2012, I think you have not noticed the dishwasher is half on tile & half on carpet - plus, the large wall separating the carpeted area with the fridge and pantry? cupboards from the main kitchen. I agree with everyone else - that professional consultation is essential. If you like the cupboards you may be able to use them in a new layout.hard to tell without seeing the whole room.