@Andrea-and-Francis0 I have to say that your one bedroom in the basement would not be legal in the United States, and may not be legal in Canada. I only see one way to get out in case of an emergency. I don't see an egress window in the bedroom which is required by Internation Building Codes. The electrical box is a small issue compared to the safety issues.
However, to answer your question, if you put in your house rules that you can access the space if and when there is a circuit breaker that is triggered, you shouldn't have any issues with going down to reset the breaker.