The sales comparison approach is best supported by:

The sales comparison approach is a widely recognized real estate valuation method that relies on the principle of substitution, which states that a property's value can be determined by the sale prices of similar properties that have recently sold in a comparable market. This method is most effective when there are properties with comparable characteristics, such as location, size, age, and condition.

Choosing recent sales of similar properties in the same neighborhood provides the most accurate reflection of current market conditions and buyer sentiments. This is because properties sold in the same area generally face similar economic and environmental factors, making their sale prices relevant indicators for establishing the value of the subject property. By analyzing these sales, appraisers can derive a market value for the property in question that is grounded in real-world transactions.

In contrast, recent property tax records, appraised value assessments, and cost of construction estimates do not directly reflect the actual market dynamics and buyer behaviors. While these may provide some insight into property values, they do not specifically account for the volatility and trends of local property transactions, which are critical in the sales comparison approach.