I would be inclined to totally ignore the building manager and schedule the job for when he is not there, after hours whatever. What is he going to do, call the police ? So what.
I ran into this when we still operated truck mounts. It was in a gated community of $3,000,000-4,000,000 homes that prohibited truck mounts because of the noise. The home was totally empty and the new owner wanted it steam cleaned. No way was I going to allow some stupid little community regulation stop me from doing the job, and it was 5500 square feet so a portable was not a consideration. We just showed up late morning and started cleaning, about half way through the job the community security/gate guards showed up. Real idiots that were looking for a fight. We just ignored their knocking until they turned off our truck mount. One of my techs that was a huge guy was out there guarding the truck mount from the security guards until I finished the cleaning.
While we were rolling up the hoses the police showed up with security. The guards had this look on their faces like "your in for it now". The cop came up and said we were violating the communities policies and they wanted us to leave. I said nope, the homeowner hired us and I have reason to be here. Then he asked me for id so the security punks could write us up. I declined, " nope the community policy is not law and you aren't authorized to enforce them anyway. We have done nothing illegal". With that I went into the house and finished a few other things we needed to do. The cops left but security set out front taking pictures of the van and us. When we started taking pictures of him he bolted.
Don't assume you have to obey some stupid rule just because some asshole says you do. I learned that while incarcerated in a christian high school run by psychopaths.
