Your tenant is causing or permitting someone else to cause a nuisance on your property. This may involve continuous loud noises, blocking fire escapes, causing leaks, failure to allow repairs to be done, etc. You should begin keeping a Nuisance Log of the dates, times and description of each incident.
If you would like to know if the circumstances in your building rise to the level of nuisance, please contact my office with a brief description the circumstances in your case. You will be contacted after your information is reviewed.