How long do you wait on a scheduled appointment at your house before you call the guy a no show?

It depends. If it’s an excellent provider who is lacking in customer service ability, I will work wait. If it’s someone who just didn’t bother to call or reschedule, I give them one follow up call from me when they’re fifteen minutes late and/or up to an hour if we have a set time and I don’t have to leave the property. After that, I call or text and tell the provider that their no show was a de facto cancellation and not to bother with the service call.

And if it’s the only appliance guy who services Miele, I’ll wait. Luckily, there are two competitors who service Sub Zero/Wolf so they tend not to keep customers waiting.

Usually 30 minutes to an hour. They are supposed to call, as a courtesy, if they are late. If it's an appointment to fix something I really need...like my laptop, or my air conditioner, then I will wait as long as it takes...and woe unto the repair person who does not call me and tell me they are running late.

It depends on the nature of the appointment, if it’s business I’ll allow a one-hour extension for traffic etc

If it’s trade, I’ll consider it cancelled once they’re 30 mins over eta

Accidents happen.
If possible i'd allow an hour.

Beyond that i'm a ghost and he's getting a bill for my time

I'll wait about half an hour and then move on to something else.🥴

Usually about 15 minutes, by then they should be professional enough to have called.

I'll give them an hour whilst cursing them in my head. 😑

After 30 minutes my day will continue on.

10 mins if no one notified me they were running late

1/2 hour

An hour

I dont. Where i live scheduled appointments are scheduled to happen between 9pm and 7pm.