Project Description. The Engineer's Estimate is an important part of the overall design process.It is a determination of the construction costs for any given project. World Estimating is a suitable place for estimating services in the state of Maryland. Maryland Estimating Services For Busy Contractors. We help busy contractors in Maryland estimate and win projects. Enhance the value and quality of your construction projects with our reliable construction estimating services in Maryland. We provide building and takeoff services to a varied range of clients in a quick time. The unit costs are for materials and installation, unless otherwise noted. 3. Accurate estimates lead to winning more projects.