Is there an official height that toilet seats are supposed to be at according to the ADA?
From the source:
and from the Appendix Note in question:
If you are putting in more than one toilet in an office, you can meet more people’s needs by putting them in at different heights. Likewise if you are leaving space for a wheelchair next to the toilet, try to have one with the space on the left and another with the space on the right. Details like how easy it is to use the lock and light switch are very important, and just having a handrails on the wall next to the toilet can help lots of people.
A toilet that is too low is better than one that is too high, as it is easy to fit a Toilet Seat Riser if needed. (This does not work for public toilets.)
At all times, think about the why. I have too often seen items like handrails on a wall that can’t be reached as it is behind the water heater, etc. Will it really work for real people?