Methods for determining a comparative valuation for an asset

A method includes determining a comparative valuation for an asset including one or more objects. Specification data for the asset is retrieved, and comparable objects including two or more attributes are generated. Each attribute includes an attribute category and an associated attribute value. Comparison weights are received for attribute categories, and analogous object data is retrieved for analogous objects that are each analogous to the comparable object. The analogous object data includes attributes that are each analogous to one of the attributes of the comparable object. Each analogous attribute includes a category, a value, and a valuation. A comparative valuation for the object is output based on the associated attribute values for the comparable object, the associated analogous attribute values for each analogous object, the valuation of each analogous object, and the comparison weights. The comparative valuation for the asset is output based on the comparative valuations for each object.