Interior design is the art and science of enhancing the interior of a building to achieve a healthier and more aesthetically pleasing environment for the people using the space. An interior designer is someone who plans, researches, coordinates, and manages such projects. Interior design is a multifaceted profession that includes conceptual development, space planning, site inspections, programming, research, communicating with the stakeholders of a project, construction management, and execution of the design.
Interior design is the art and science of understanding people’s behavior to create functional spaces within a building. Decoration is the furnishing or adorning of a space with fashionable or beautiful things. In short, interior designers may decorate, but decorators do not design. In the mid-to-late 19th century, interior design services expanded greatly, as the middle class in industrial countries grew in size and prosperity and began to desire the domestic trappings of wealth to cement their new status. Large furniture firms began to branch out into general interior design and management, offering full house furnishings in a variety of styles. This business model flourished from the mid-century to 1914, when this role was increasingly usurped by independent, often amateur, designers. This paved the way for the emergence of the professional interior design in the mid-20th century.