Why might the actual size of a property differ from what is shown on a Real Property Report (RPR)?

The answer indicating that the actual size of a property might differ from what is shown on a Real Property Report (RPR) because of changes in a stream course is correct due to the dynamic nature of natural features such as waterways. Streams can shift due to natural forces such as erosion, sediment deposition, or changes in water flow, leading to alterations in property boundaries as defined by those natural landmarks. If a stream changes its course, it could encroach onto or remove land from a property, resulting in a discrepancy between the RPR and the actual land size.

It's important to note that outdated maps and inaccurate land surveying also have roles in discrepancies but do not specifically address natural changes like a stream reroute. Properties are indeed subject to re-evaluation; however, this typically refers to reassessments for tax purposes or market value rather than reflecting immediate physical changes to property lines. Thus, while other options may imply potential reasons for discrepancies, the specific change in the stream course directly affects the property’s actual dimensions.