There are those glass doors that have internal blinds between the glass. That would give you the option of privacy if you wanted it at some point. The double layer of glass would provide some sound insulation also.Those doors seem to come in various styles. Glass doors sound like a good option so you still get natural light through and wouldn't get a closed-in feel. You'd loose a little bit of the open look when having area framed out for a door. Unless you have a transom window above a door I suppose. Could you have something like a magnetic door stop mounted low on the wall so you can have the door stay open when you have the place to yourselves? I would be inclined to have a door fitted at the foot of the stairs and when left open, sitting up against that length of wall on the kitchen side in the short corridor. Hope that makes sense...

please post a plan of the whole house showing all the rooms and include the height off the ground from each entry door and the distance to the side boundaries

With your design you could install doors in hall. I have circled on plan. (Two options) However the hall is long, so someone seeing right through to family room,should not be a problem. With furniture, draw furniture to scale on your house plans. Then you can work out what size furniture will fit in your space, and where would be the best position for furniture. For example if there is a television in family room, where would that be? Then which way would lounge face. Etc. don't buy furniture before you work out where it will be positioned.

Hello Katie, Ms House is very appropriate! Lovely chunk of dry land there with views too.... wonderful. With the north up the page, why not face the longest side of the house to it for best passive solar gain. It will depend on other things too like where are you? Where will the vehicle access come in from, where do you plan the garage to be? Lots of other things will influence where the front door goes: if you follow passive solar design you would have an air lock to the external doors so the heat or cool within the home does not escape with a knock on the door. If you would like to chat about this further, this is what I do best: get the plan right for YOU! A phone call and chat is the best place to start... Happy to assist. Regards Margot