Contractor authorized tree cutting without consulting property owners

I hired a contractor to rebuild a previously demolished garage on my property. He had to bring in a crane to do some heavy lifting. The crane operator told the contractor the trees were in the way and asked if he could trim some branches. The contractor gave the okay without consulting me or alerting me there was an issue. It's this common? I'm pretty upset about it but before throwing the alarm, is this something that should just be accepted as part of the job?