What term describes a woman purchasing multiple lots to build a large house in a neighborhood of smaller homes?

The term "assemblage" refers specifically to the process of combining or collecting multiple parcels of land into one larger unit. In the context of a woman purchasing multiple lots, this term accurately describes her actions as she is bringing together several smaller lots to create a single, larger property for the purpose of building a large house.

The concept of assemblage is significant in real estate and land development, as it allows for the transformation of smaller, potentially less valuable properties into one that has greater potential for development and construction, especially in areas where zoning regulations may encourage such practices.

While "subdivision" refers to the process of dividing a larger tract of land into smaller lots, it does not apply to the situation of acquiring multiple lots for a larger development. "Consolidation" and "aggregation" might also seem relevant as they imply bringing things together, yet they tend to refer to broader concepts of combining or collecting without the specific intent or context associated with real estate development found in "assemblage." Thus, the choice of "assemblage" perfectly fits the scenario described in the question.