Which of the following methods is particularly useful when no sales of vacant land are available?

The Allocation Method is a technique used particularly in situations where there are no sales of vacant land available. This approach derives land values by examining sales of improved properties. In this method, values of land and improvements are separated, allowing for an estimation of the land value based on a percentage allocated from the total property value.

This method can be very effective in markets where vacant land sales are sparse, as it leverages market data from comparable improved properties. Assessors can analyze the sale prices of properties with existing improvements and apply a consistent ratio to determine the value of the underlying land.

The Abstraction Method focuses on estimating land value by deducting the cost of the improvements from the total property value, which is less practical when there's a lack of data on vacant land. The Capitalization of Ground Rent Method typically applies in scenarios where consistent ground rents can be capitalized, making it less relevant when there's no data on vacant sales. The Anticipated Use or Development Method relies heavily on projections of future income that land could generate, which may not be feasible without solid sales data for vacant land. Thus, the Allocation Method stands out as the most effective when direct sales data for vacant land is not available.