Pardon the translation, but I had to read this three times to understand. Sloped yard, master suite, and courtyard. Now, that should be possible, but you will need to ask your local building codes office if the room/garage addition will fit in the space and hire an architect to develop the plans. There may need to be some alteration of the foundation for the inside of the U portion of the house. There will also need to be a redesign of the roof for the entire house with the master suite addition. The architect should be able to tell you what will need redoing or built.

The average sq. ft. for a 2 car garage ranges from 19x20' to 22x26', depending on how much storage/utilities people want to set up in the garage. In our county, the minimum length for a garage is 18' (one car) with a 9' width. Hopefully this info can get you started, at least. My advice to you is to do the foundation for as large an addition as you can. Use this opportunity to reconfigure your rooms next to the addition, if necessary. You are looking for a good "flow" between the old and new. Smaller additions actually cost much more per sq. ft. because all the same equipment is used, regardless of how big or small the addition is, when you are talking about foundations, framing, etc. Good luck! Keep us posted on your progress.

The plans are very very rough. First draft just to get an idea of layout, he even said we would probably move the Washer/dryer, toilet, sinks etc to fit our needs. It just to get an idea of how we could lay it out before he added all the details and to get an estimated price so we can make a decision. I agree with all of you, its not functional and it needs to be changed. We tried to maximize the views on the West side of the house with the living, dining, kitchen areas. We don't have a lot of stuff either. we do not need wall space. All we need is a bed and a closet, we have capsule wardrobes, we don't do TV, we don't need excess furniture. We spend our time outdoors, gardening and as a family. So we need a very functional mudroom that can be our catch all, be our winter potting room, house all of our summer produce so its not spread out in the kitchen, and be a place for homework. I'd say we are very different than many people who want to make sure they have space for all of their furniture and plenty of wall space for shelving and trinkets and curio cabinets etc. Thats just not us, to me that is just noise that stresses me out. I am hoping for an opinion from other minimalist minded people who can tell me that that A )this is too much space and we can do with less or B) that can help with layout). You all have talked me into just starting fresh with a new home. Even our architect recommended that. It becomes a problem when you can't get your husband on board. So if I can't, I need to rework this thing to the best of my abilities to make it work for us. I already mentioned to him that I am not interested in spending this much money on getting something that is not functional. I'd rather just keep it the way it is in that case. In my area, I do not think that $140 a sq ft is unreasonable. This is my neighbors house that just went up this summer. They ended up at $140 per the contractor and I would keep it more simple with roof pitches etc.

Not sure where you are located but in my area garages and small, like 100 sq ft, additions both cost well over 50k. Does your neighborhood and bank account support expensive upgrades? It is often less money to move to a house that already meets your needs than to add onto existing properties. I am not against additions and I have made emotional decisions on my own property but I know I will not recoup those costs. It was money spent not invested but we could afford to make changes because we waited until we were mortgage free. As to your question I prefer young kids on the same floor as me and I think sharing a room is a great life experience for siblings while they are young. I also know planning for more kids does not always mean having more, so I would not spend 100k on a possibility. I would wait until after I knew for sure that I needed more room and a toddler and infant can bunk together while deciding what works in reality for the actual family you have.