A four-bedroom house with only one bathroom is an example of?

Functional obsolescence refers to a reduction in the desirability or utility of a property due to outdated features or poor design. In the case of a four-bedroom house with only one bathroom, this layout can be viewed as a major drawback for potential buyers or renters. Typically, a home of that size would be expected to have at least two bathrooms to serve the needs of its occupants comfortably. The mismatch between the number of bedrooms and bathrooms means the property may not function optimally for modern family living standards. This lack of adequate facilities impacts the overall value and appeal of the home negatively, which aligns with the concept of functional obsolescence.

In contrast, other options present different issues relating to property value. For instance, overimprovement refers to making enhancements to a property that exceed what is reasonably expected in the neighborhood, while external obsolescence relates to factors outside the property that negatively affect its value, such as nearby nuisances or deteriorating areas. Deferred maintenance indicates necessary repairs have not been made, thus impacting the property's physical condition but not specifically linked to the design or functional aspects being outdated, like in the case of the single bathroom in a four-bedroom house.