Drafting and modeling services are important preconstruction services that help streamline the building process. Drafting involves creating technical drawings like architectural, structural, and MEP drawings using CAD software. Modeling involves developing 3D BIM models containing detailed geometric information about building design. These services provide specifications and catch design issues, allowing modifications and improving design quality before construction. Preconstruction services improve efficiency by reducing rework and helping stakeholders obtain maximum benefits from well-planned construction.