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.

I love your post, there is a blueprint and you are giving out details and whishes witch is making it easier for all of us to help you and your family. This floorplans reminds me a bit about my uncles house. here are some of my thoughs witch you may/or may not use. I am not sure about the NSEV directions which have a major influence in building a house. Parenting so many kids also influence the house and the lifestyle in the home. I would maybe add, or rebuild an ancle to the house prevent from wind on the terrace. Commidded as you sound i would go all in with all of your wishes. I think a big master bathroom is needed to be used as a place to relax with so much to look after. I dont now if your coing to use the door in the lundry room or in the pantry most. I thinks its best to have your garrage entry close to the pantry and kitchen. A open kitchen is also a big decision when you have so many young kids. I would maybe add a breakfast area in the kitchen. SOme other things to consider is maybe the entry and the long hall way. I think you and your family might be a bit tired of the loong hallway. if possible i would switch the entry and the office. to make the entry in to the livingroom, if le librarry is going to be used as a familyroom. A toilet should always be placed near an entry to the house. And an extra toilet is only for u to clean along the way.... I you are looking to expad the family i would maybe build a playroom in the middle of all the kids rooms. At my uncle ealier house theay had a combined office space, guest room, playroom to combind a space for all of the children and their friends to be in. As far as going to design in your home can also maybe influence the layout. I think wood floors or tiles depend on style. I Personally prefer laminet wood floors in the kitchen and entry, but you are to buy some lovely tiles now a day. Pleace ask for a new blueprint suggestion if you are up for some changes. good luck.

You could reverse the layout of the ensuite, and have the door to it through the walk in wardrobe (so you would only have one door coming off the bedroom). If I were you, I'd consider swapping the positions of the ensuite and wardrobe, so the current ensuite door becomes the wardrobe door. That way you could move the bed to the east (right), and you would have room for a seating area in the north west corner of the room (as your bedroom looks huge!). I'd also add a window on the small bit of north facing wall in that room; you already have corner windows in the living and another bedroom, so you could match those in style. Personally I don't particularly like the current layout of the main bathroom, although I can see the reasoning behind it (i.e. vanity at entrance, toilet hidden behind wall, window above bath). I think it might work better if you put the shower in the corner where the bath currently is (i.e. beside the toilet, opening to the west), and the bath on the same wall as the vanity. You'd have to move the window, of course. Alternatively, do you actually need three toilets? You could remove the toilet in the main bathroom, and you'd have room for a freestanding bath and/or a bigger shower. You could consider stealing a bit of space from the kitchen to create some storage at the entryway. I'm not sure where your garage will be, but it's really handy to have a designated place at the point of entry for all the stuff you tend to dump when you first come into the house (schoolbags, coats, mail etc). Overall, I think the layout is pretty good, but you could potentially lower the build cost by making it all a bit smaller. It's really worthwhile taking the time to figure out just how much space you actually need, and where you need it. For example, if it were my house, I'd take about half a metre off both the east bedrooms (so the house is shorter from east to west), plus I'd make it smaller north to south by slightly reducing the size of all three bedrooms, and making the kitchen a bit smaller (so the hall cupboard lines up with the back wall of the small living room). But your priorities may be completely different from mine!

I would go with the larger bedroom if you already have plenty of other toilets and are happy using those.