Which of these might trigger an inspection of rental properties by authorities?

Tenants' complaints can indeed trigger an inspection of rental properties by authorities. When tenants report issues such as unsafe living conditions, health hazards, or violations of tenant rights, local housing authorities may conduct inspections to ensure compliance with property regulations and codes. These complaints serve as indicators that there may be problems that need to be addressed to protect tenant safety and welfare. Responding to such complaints is crucial for maintaining standards in rental housing and ensuring that landlords fulfill their obligations.

In contrast, scheduled annual inspections typically occur as part of regular property management practices and are often planned in advance, not triggered by urgent complaints. Property renovations are usually conducted with the intent of improving or updating a property and might be subject to permits and regulations, but they wouldn’t generally prompt inspections unless they violate existing codes. Rent increases, while they can indicate changes in property management or market conditions, are not inherently linked to conditions that would lead authorities to inspect a property.