An interior decorator may work in a variety of venues from a design showroom to a retail store. There is no government regulation regarding the work of an interior decorator and they spend less time in school. Interior decorators are concerned only with the look or appearance of a building or space.
An interior designer has a more specialized career field, requiring a certain combined level of education and work experience. An interior designer may also deal with issues of safety like accessibility and building codes as well as having additional experience with architecture. Interior designers have to be able to design a space and deal with possible problem areas using skills to create a solution, focusing on function in addition to aesthetics.