If there is a legitimate disability, the ADA may apply. 

I imagine the ADA, Fair Housing laws or HUD would provide some guidance.

Here is an article addressing the ADA compliance. https://adata.org/faq/how-can-... 

Taxes, insurance, fire, ADA, EPA, etc. 

I read on the ADA site but could not find that detail. thanks in advance

As for your other question, it is not the easiest to get previous years tax info, but at least for Ada county you can go to the assessors website and look up that specific property and see previous years.

Make sure your application process and the ads are ADA and 504 compliant.

Hesperides 3/1 house that I sold without a sign or an ad as the Buyer was walking the neighborhood, looking for something next to her boyfriend next door.

For stats this year only one SMF property has sold FHA in Ada county, and one in Canyon.

Commercial projects require sprinklers in all units, ADA (in 1-unit), a civil survey, DRA, etc., etc.