Which of the following houses is characterized by two levels of living space but maintains a compact layout?

The one-and-one-half story house is defined by its unique design that includes two levels of living space while maintaining a compact and efficient layout. This architectural style typically features a main floor with a traditional ceiling height and a second level that may include bedrooms or additional living space, often tucked under the roofline. This design maximizes the use of available square footage while providing a cozy living environment, making it a popular choice for homeowners looking for a balance between space and compactness.

In contrast, a split-level house generally includes three levels that are staggered, creating distinct living areas separated by a few steps, which does not align with the idea of a simple two-level layout. A multi-level house often implies multiple distinct stories above the ground level, leading to a larger and more complex structure rather than a compact design. Lastly, a Victorian house is characterized by intricate architectural details, often featuring multiple stories and a layout that is not necessarily compact, focusing more on grandeur and ornate features. Thus, the one-and-one-half story option best fits the description of a house with two levels of living space while maintaining a compact layout.