What is typically increased when two adjacent properties are combined into one?

When two adjacent properties are combined into one, the concept referred to is known as plottage value. Plottage value represents the increased value of the newly combined property due to its larger size, which often allows for more potential uses, improved access, or enhanced development options.

Combining properties can create a more appealing and larger tract of land that may have a higher overall market value than if the two properties were sold separately. This increase in value as a result of merging properties is a key aspect of plottage, and it reflects how the sum of the parts can be worth more when they are assembled together than when sold individually.

In contrast, while site value, marketability, and investment return could also potentially be influenced by the combination of properties, they do not specifically encapsulate the idea of increased value derived from the aggregation of adjacent properties as effectively as plottage value does.