Well the government does mandate how many handicap parking spaces and further moe how high counter tops should be, bathroom bars etc ad infinitum and if you are in California or I think Florida, its been a booming business for ADA attorneys. To the point of legalized extortion. Ask any business owner who has been sued by one of these ADA abusers. Clint Eastwood fought and it cost him about $700,000 in lawyers fees and he won..the object was to crush the small business owner with attorney fees and make it easier to settle for 2-10k nad many of the claims were ridiculous and the claimmant never even went to the business.
http://www.adaabuse.com/pinnockwakefield.html
Penn & Teller showed exactly such ADA abuse in their BS show, season 5, episode 7.