While ensuring that you have spacious hallways and a way of moving between floors may be rather obvious, there are more subtle ways to make your home environment functionable even for those with various disabilities.
Replacing doorknobs with push/pull bars, press lever handles, or automatic doors makes a world of difference for someone using a wheelchair or a walker. As does removing thresholds or installing ramps over ones that cannot be removed, as well as installing handrails in key areas of the home.
Which solutions fit your home depends on its design and your specific needs. The idea is to ensure that all the little functionalities that a home provides, which can easily be taken for granted by able residents, should be made as easy for those with special needs.