Exterior design refers to the physical architecture and organizational elements of the outside-facing components of a building. Exterior design encompasses both physical structures as well as personal and artistic designs such as paint color, roof shape and material, decks, patios, gardens, and more
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 enhancement projects.
On the most basic level, a good interior design improves a space by making it better suited to its purpose. For example, if you’re designing a bedroom, you will make decisions that lead to it being more relaxing. For an office, good design will make it more focused and efficient