Defining construction costs This document is only available to paying isurv subscribers. Construction costs are defined as the cost of the construction works and the contractor’s direct costs. Table 1 summarises what these include and exclude. ... Sign up for a free trial here. Please note that the free trial does not include access to downloads. Or sign up to the isurv bulletin, our monthly newsletter detailing the latest content on isurv. For further questions, don't hesitate to call: +44(0)247 686 8555.