If an online valuation system cannot find a property valuation, there are several common reasons. For example, the property may not be a popular estate, such as some public housing, village houses, or single buildings, which have fewer transactions. The online valuation system can generally only access more popular estates. It may be more difficult to obtain information about the above properties through online property valuations.
Another possibility is that the unit is a "haunted" property, which may have been the site of unfortunate incidents or unnatural deaths. This can affect the valuation of not only the incident unit but also the upper and lower levels or neighboring units. Due to the complexity of valuing such properties, even using a property valuation service may not provide information from the bank's online valuation system. Additionally, some unique units, such as top-floor units with rooftops, may also be difficult to value online due to their low transaction volume, limited supply, and significant price fluctuations.