Residential interior designers are responsible for the layout, design, and decoration of residential building spaces. They revamp people's homes, houses or condos. These designers should possess an artistic flair and the business acumen necessary for planning interior spaces and managing projects. Residential interior designers work closely with customers, architects, and other professionals to decide on the structure of a space and to determine the needs of the building's occupants. Residential interior designers should possess the creativity of an artist and the abstract skills of an engineer.