Will you walk the building before quoting? A company that prices a commercial space sight unseen is guessing. A walkthrough shows floor types, restroom counts, traffic patterns, and the problem areas that drive the real workload.
What exactly is included? Ask for a written checklist by room and frequency. 'General cleaning' means different things to different companies; a checklist means the same thing to everyone.
Who will be cleaning, and will it be the same people? Consistency matters. Crews who know your building don't need alarm codes and supply closets explained every week.
How do you handle floors? Many cleaners mop hard floors but never maintain the finish. Ask whether they strip, refinish, and burnish VCT, and whether they extract carpet or only vacuum it.
What happens when something is missed? Every company misses something eventually. The answer you want is a fast, simple fix, not an argument. Ask how to reach them, and how quickly they respond.