Answer : A 4-year degree in interior design from an accredited university is the most common route to becoming an interior designer. However, some states, like Colorado, do not have specific licensing requirements for interior designers, so a degree may not be necessary.
That said, many employers do prefer or require their employees to have a degree in interior design. And while some states may not have licensure requirements, it's important to understand that there are other professional certifications and organizations that you can join as an interior designer (like ASID). These organizations offer additional training and educational programs that can be beneficial for your career.