There is no rule on how many inspections per year you should conduct, but depending on the situation you may need to inspect the premises three times or more each year. There are several factors that should help you determine when and how often inspections are needed. To enforce the lease agreement, inspect periodically so you know whether or not the tenant is in default. As a landlord, you need to conduct reasonable inspections to determine if there are any dangerous or hazardous conditions that need to be remedied.