A floor plan is an architectural drawing showing a building's layout as viewed from above, typically depicting walls, doors, windows, stairs, and room arrangements at a horizontal cut through the structure. Floor plans are fundamental to architectural design, construction, and real estate, conveying spatial organization that three-dimensional views cannot easily show. They indicate room dimensions, traffic flow, spatial relationships, and functional arrangements. Municipal development applications include floor plans to demonstrate compliance with building codes (minimum room sizes, exit requirements, accessibility) and zoning (floor area calculations). Residential floor plans help buyers understand home layouts, while commercial floor plans inform tenant improvements and occupancy planning. Modern floor plans may be produced using computer-aided design (CAD) software, enabling easy modification and integration with other building documentation.