1. Missing smoke/CO alarm in basement recreational room – must install hardwired, interconnected com

Hi Amber, Yes, one person can complete this task, it will just take longer if walls and ceilings are already drywalled/finished.

Yes one person can do this job. Will definitely take longer.

Yes, one qualified electrician can complete the entire job. Installing a hardwired, interconnected smoke/CO alarm is typically a single-person task. The only thing that may add time is if the basement ceiling and walls are already finished, as running the new cable might require opening some drywall.