An interior designer is a professional who plans, designs and oversees the decoration and layout of interior spaces in residential or commercial buildings. They work with clients to create functional and aesthetically pleasing environments that meet their needs and preferences while taking into account factors such as safety, accessibility, and sustainability. Interior designers often collaborate with architects, engineers, and contractors to ensure that the spaces they design are not only beautiful but also structurally sound and functional. They may work on a variety of projects ranging from residential homes to commercial buildings such as hotels, restaurants or offices.