What is an improvement that is authorized but not required by the landlord termed as?

The term that describes an improvement authorized by a landlord but not required is known as a permissive improvement. This concept highlights that the landlord has granted permission for such enhancements to be made, indicating a level of flexibility or discretion regarding the property's condition or features.

Permissive improvements can benefit both the landlord and tenant by enhancing the value or utility of the property without imposing any obligation on the landlord to maintain or ensure such enhancements occur. This supports the relationship between landlords and tenants, allowing the tenant to personalize or upgrade their space while ensuring the landlord retains control over what alterations are made.

In contrast, conditional improvements imply that certain conditions must be met for those improvements to be made, while necessary upgrades suggest essential repairs or enhancements required to meet safety or legal standards. Voluntary enhancements might give a sense of personal choice but do not specifically clarify the landlord's role in authorizing such changes. Thus, permissive improvement is the most precise term representing the scenario where a landlord allows improvements but does not mandate them.