Although all of the following may help facilitate the sale of a property, which one is an improvement to real estate?

Painting the exterior is a cosmetic improvement that can enhance the appearance of a property but does not add to its structural integrity or functional space. While it may attract potential buyers, it does not constitute a permanent improvement to the real estate itself.

Installing new windows can improve energy efficiency and potentially enhance the aesthetic appeal of a home. However, like painting, it is primarily a cosmetic or maintenance upgrade rather than a substantial addition to the property's value or utility. It does not significantly change the property's footprint or structural features.

Changing to commercial zoning can alter the potential use of a property, allowing for different types of business activities. However, it does not physically improve the property itself. Zoning changes can add value in certain contexts, but they do not constitute a direct enhancement to the real estate structure.