There are tandem latches on the casement windows. This means the two handles are linked together, so if you open the bottom one the top one opens too. They incorporated a lot of bi-fold doors and pocket doors in the house. These waste less floor space than swinging doors, and they're easier to use for someone with limited mobility. They have large lever handles that you can open with just one finger.
Rocker switches for the lights are easier to use than standard switches.
They help whether you've got stiff joints in your fingers, or just an armful of packages. All of the wall outlets are about 20 inches off the floor instead of the usual 12 inches. This means less bending over when plugging things in, and Robert can reach them from his wheelchair. The door leading from the house to the garage has an automatic door opener . A button on the wall opens it up, and it stays open long enough for someone to get through, then closes.