I have been involved for 20 years in advocating for those unable to advocate for themselves. I have performed countless site visits, and they yield the same results. Most people, architects included, have only rudimentary knowledge of what is needed. As a result, better access never becomes a reality because it is too late to rectify what has been done.
I can’t stress this point enough: Get in touch with the Boston Commission for Persons with Disabilities while in the planning stage.