Being that the building is over 100 years old, i.e. prior to the 1992 ADA, what ADA/FHA access provisions am I required to supply?

Now if you look only six Avenues South, you see Ada Boulevard where many houses sell for $1,000,000 or more.

We didn't know that the city didn't like those plans (Mistake #2).The contractor eventually was in over his skis between having to increase the diameter of the public sewer line to ADA compliance to the required indoor sprinkler systems, so a few weeks after closing on the property, he had to walk away from the project.As we scrambled to find a new contractor and to get our plans approved by the city, our holding and soft costs ballooned. 

They have coatings you can get that makes the tub less slippery.They have ADA type handrails you can install.They make slip resistant flooring. 

Regarding ESA (emotional support animals), I find it frustrating that the FHA and ADA differ on whether ESAs must be accepted or not by landlords.

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