Architectural plans are detailed technical drawings that show how a building will be designed and constructed. These plans include floor layouts, elevations (views from each side), cross-sections, and specifications for materials, dimensions, and structural elements. When applying for a building permit, property owners must submit architectural plans prepared by licensed architects or designers. Municipal building departments review these plans to ensure compliance with building codes, zoning bylaws, and safety requirements. Approved plans become the official blueprint that construction must follow, with inspectors checking that the actual building matches the approved design.