Designers are formally trained to prepare drawings and documents relative to the design of interior spaces in order toĮnhance and protect the health, safety and welfare of the public.” (Source: NCIDQ website) In Ontario, the title, “interior designer” is protected under a provincial Titles Act. A designer is responsible for performing services relative to interior spaces, including programming, design analysis, space planning and aesthetics, using specialized knowledge of interior construction, building codes, equipment, materials and furnishings. What is the difference between an Interior Decorator and an Interior Designer?Īn interior designer is “a professional who identifies, researches and creatively solves problems to interpret the function and quality of interior environment.