If you have an elderly parent who is going to be moving in with you, you might want to provide them with a space that's built just for them. They may be moving in with you because they need a little help, but that doesn't mean that your parent doesn't want as much independence as possible. One way to give them that is to have something called a mother-in-law apartment.
These are generally quarters that are set up with their own entrance and possibly a connecting door to the rest of the house. They generally consist of a bedroom, bathroom, and a kitchenette, such as what you may find in a studio apartment, and may even be a full apartment over a garage or other structure. You can design it so that it meets everyone's needs. If your elderly parent has some health issues, there are things that you can have built into the quarters while you are having it created.
One thing you can do is to have an intercom system wired into the living area as well as the main house. Even if the new mother-in-law apartment that you are having done over is part of the original house, you are still going to want to make sure that you and your parent both have a way to get in touch with each other in case something happens. If something happens to your parent, they can get you on the intercom and you can help them. With some systems, you can get a wearable part of the intercom system or an emergency button that your parent could hit if they can't get to the main system.
Extra Wide Doors
Another thing you can do is to make sure that all the doors are built extra wide. This will make sure that your parent has plenty of room to get in and out of various rooms if they need to use a wheelchair or a walker. When you are planning the doors, you want to do more than just wide enough for a wheelchair to get through, you also want to make sure that your parent's hands and arms will fit through while they are on the wheels of the chair, so make sure to have the contractor add in those extra inches.
If your elderly parent needs to move in with you, you can create their own quarters and let them have some privacy and independence while still making sure that their needs are met.