Which factor is NOT considered when researching comparable properties?

When researching comparable properties, the number of previous owners is generally not considered a relevant factor. This factor does not directly affect the property's market value or influence the price at which comparable properties are sold. Instead, what matters more is the property’s current condition and characteristics, which are affected by factors like land use constraints, buyer motivation, and the date of sale.

Land use constraints can significantly affect property valuation, as they determine how a property can be used and may impact its desirability and market value. Buyer motivation is critical to understanding market dynamics; it influences sales prices based on what buyers are willing to pay under current market conditions. The date of sale is also essential since the real estate market is fluid, and prices can vary significantly based on economic conditions at different times.

Thus, while the number of previous owners might provide some context about a property's history, it does not provide direct information that influences its current valuation or market comparability.