Completing a careful project review, determining the complexity and scope of the project, and defining product selections allow us to provide you with an exact job cost. Any subsequent change in the project cost would be a result of a client-requested change or due to discovering a concealed condition. As a general rule of thumb, you should allow 10% to 15% of the estimated construction costs for unexpected expenses and changes you may want to make. Our Construction Management Software is an extremely valuable tool in this process.