In short, there most certainly ARE legal restrictions on building your office somewhere deliberately selected for it's inaccessibility to those with a congenital inability to e.g. teleport,

The Americans with Disabilities Act limits what you can build (every building needs ramps and elevators), not where you can build it. Zoning laws are blacklist-based, not whitelist-based, so extradimensional spaces are fine. More commonly, you can easily find office space in locations that poor people can't afford to live near. And in the unlikely event that race or national origin is the key factor, you get to choose which country or city's demographics you want.

A lack of teleportation-specific case law would not work in your favor, given the judge's access to statements you've already made.

This is the identity under which I speak freely and teach defense against the dark arts. This is not the identity under which I buy office buildings and hire minions. If it was, I wouldn't be talking about hiring strategies.