You need to know and understand Fair Housing, ADA, Lead-Based Paint, and mold issues.

If somehow you win this by using ADA, your win will only be temporary.

If they now say that it was only for walk traffic, then they/you should maybe also check with ADA, because that would mean that they are now punishing someone for being handicapped in a way.

Bill S. made a very good point, follow it, there are "testers" some are very good, for example, they may say to a Realtor "I'm wheel chair bound, can you pick me up, I'd like to see this house" guess what, Realtor may need to go get an accessible van under ADA.

I also try to include room sizes in the ad as well.

From the example above you guys will notice that it shows me the keywords that trigger this specific ad. As

(3) I also read that FHA governs rental property while ADA is for public places. 

Emotional support animals, comfort animals, and therapy dogs are not service animals under Title II and Title III of the ADA. 

Here's the official  ADA FAQ's 

If there was an architect involved, the zoning laws and other items such as ADA Compliance, Title 24, and other design-related items usually fall under their purview.