Have you considered a residential elevator? Might open your options up to other plans as well. Just throwing out ideas here and they are worth what you paid for them ;) What other plans might be available as a starting point. I can see plenty of ways to re-arrange things so it might work better overall. How much freedom do you have with changes since you mentioned semi-custom? Since you won't be using the upstairs it seems like you'd have a massive roof on this as a one story and thus a lot of extra cost to build something you wouldn't use. How wide can the house be? The location of some of the rooms, the choppiness with the room re-arranging and the sizes of rooms seem less than ideal for long term living and may make you feel the house isn't as nice as you wish when you live in it so hence my questions to see if we can help you achieve your goals, save you some money, and have a well thought out house that will work for you and your family as well as your care-giver. Our very good friends and next door neighbors have a handicap accessible house that works really well for our neighbor who is in a wheel chair and ours is built with handicap features as well and he can navigate just fine in our house. I think the way their house is laid out might work well for your needs and be able to create a care-giver's area with 2 extra bedrooms. It is a fairly simple shape, but they do have a detached garage. What are your requirements beyond accessibility? Square footage, garage, max width/depth of house? Here's an idea of how you could re-arrange it a little differently, but still has an addition at the back. I made the laundry the common access point, unless you absolutely want that to be separate. It could be accomplished. By moving the laundry I also made it easier to vent to the outside. It seems to me like if you can arrange your house space a little separate from the care-givers it will flow a little better, be more private for both. Just one wall to make sure noise doesn't travel and the house seems a little more integrated and not spread out so far. A little more like a duplex and the care-givers guests won't need to even walk by your front door to visit and inadvertently ring the wrong door bell. It is more like a duplex type design. This is just an idea to illustrate the concept and the layout could still be better, but just to give you some ideas of what I'm talking about. If you absolutely have to stick with the other design I would consider at least changing the bathroom up to be more like the one I drew in the care-givers area so you can get some more space for the kitchenette and sitting area. The other bathroom wastes a lot of space and since used by only one person for the most part could be simplified and use the space elsewhere.

You would have to work the dimensions of this out to make sure it works, but what about something like this? If the island doesn't fit, you could do a peninsula instead.You could also flip the cooktop/sink walls and the island orientation - I went back and forth about that, but I thought that since you can see the back wall from the front door, the cooktop there probably looks nicer than the sink. But it could go either way. If you need more clearance for the walkway the hutch could also go where I show the green, or it could go on the wall between the bath and the

I can't read the plant list but I am curious about the bed shape you want. It looks like a Beagle. I'd simplify the bed shape.Is this area the lowest part of your yard? Other than that I am just giving you a bump. Sorry you were ignored for so long.

(not a pro) Looks like it will be a lovely home! Have you considered making the window in the mudroom a door instead? I realize people can go through the garage to get there, but I like having a door right into my mudroom for letting the dog out (and being able to keep an eye on him from inside) and when the kids were young they could come in and out directly for the mudroom, restroom, etc. You could have a door with a nice window so you don't lose that light and window view from down the hall. And do you need the door that's currently into the mudroom from the center hall? If you do, I might swing it the other way or make it a pocket door so it doesn't block the cabinets. Have you looked into the pros and cons of double entry doors? I like how they look, but some people find that they usually only use one at a time. Also be sure that the locks are as secure as a single door locking into a frame. You also need to figure out where your light switch for the front hall will be so it's not covered when you open the doors. You might be just as happy with a nice single door that has windows, a transom and 2 sidelights.