Modular building construction plans must include the following drawings and information. Use this checklist to be sure your plans are complete.Go to the DCRA main webpage – dcra.dc. Gov – to complete a building permit application. 2. Washington County Electronic Plan Review (EPR) is a web-based solution that allows plans for Building permits and projects to be. Chapter 4 provides requirements for constructing footings and walls for foundations of wood, masonry, concrete and precast concrete. Do I need an architect or engineer to prepare my plans? Washington State has requirements for when an architect is required to complete a set of plans. References to undesigned future building components in the Proposed Building.