Is it legal for the property to restrict the subordinate cleaning staff from going to other floors to open water?

Illegal. According to the relevant public information, the property company did not follow the laws and regulations or the provisions in the property contract when restricting the cleaning staff from going to other floors to open water, and it was suspected of infringing the cleaning staff's labor rights or personal rights, which was illegal. In this case, the cleaning staff can consult relevant departments or lawyers and take appropriate legal measures to safeguard their rights and interests.