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"Class-C" Estimate

Sometimes referred to as an “Opinion of Probable Cost”. 

This class of estimate has a lower level of precision than Class B and A and is intended for screening alternative design solutions when the project  is not yet clearly defined. The estimates provided to the owners during the early design stage are based on conceptual scopes of work and fall into this category. 

This is a ‘top-down’ type of estimate which analyzes the historical costs of similar projects elsewhere. Capital appropriation requests and commitments should not be made on these estimates.  



See also: