Believe it or not, sometimes, the very offices that are meant to help those with disabilities are themselves inaccessible. I've heard this from those with disabilities, and was actually pretty incredulous when I did hear it from them.
Here's an article that has some background.
I *think* part of the problem is simply, that it is expensive to implement simple things like wheelchair ramps and accessible restrooms in businesses. Let's look into laws and processes that help businesses finance the cost of putting in accessible features into their businesses.