How to become an Interior Designer: a step-by-step guide

Interior design is a dynamic and respected profession that shapes the way we live, work, and interact with our environments. As demand grows for personalized, functional spaces – especially in kitchens and bathrooms – so does the need for skilled, credentialed professionals who understand both form and function. 

This guide outlines a professional pathway into interior design, whether you're starting from scratch, switching careers, or building on related experience. We also spotlight key industry partnerships that help elevate the profession, including the NKBA (National Kitchen & Bath Association), NARI (National Association of the Remodeling Industry), and Design Flex's academic program, which equips future designers with real-world knowledge and industry-standard tools. 

Understanding the interior design profession 

Interior designers are responsible for planning and executing spatial solutions that improve the quality, utility, and aesthetics of built environments. Their work goes beyond decoration. In residential and commercial projects, they: 

Exploring your education path: Degrees and alternatives 

There is no single route into interior design. Some professionals enter through two or four-year programs; others build credentials through short-form certifications or the less-common apprenticeship route. 

Option 1: Formal degree programs

Many colleges and universities offer Bachelor of Fine Arts (BFA) or Bachelor of Science (BS) degrees in Interior Design. Accredited programs (e.g. CIDA-accredited) include coursework in: 

For those seeking a shorter or more flexible route into the profession, Associate of Applied Science (AAS) or Associate of Arts (AA) degrees in interior design are widely available. These programs often focus on: 

Option 2: Industry-Aligned training programs

Organizations like the NKBA (National Kitchen & Bath Association) and NARI (National Association of the Remodeling Industry) offer focused certification and training programs, especially in kitchen and bath design. These programs emphasize both creative and technical skills. They are ideal for professionals who want to work in high-spec residential projects. 

This type of training is especially valuable for those already working in the industry – such as designers, installers, contractors, or sales professionals – who are looking to upskill, specialize, or stay current with evolving trends and technologies. Many certifications require or encourage the completion of continuing education units (CEUs) to maintain credentials and demonstrate ongoing professional development. 

Whether you are deepening your expertise or preparing for NKBA certification, industry-aligned training helps ensure your knowledge stays relevant, competitive, and aligned with modern consumer expectations. 

Building a portfolio that reflects your skillset 

Your portfolio is your most powerful asset. It tells clients, firms, and manufacturers who you are as a designer – and what you're capable of. 

Include: 

Tip: Organize your portfolio by space type or design style. Use a digital format like a custom website or cloud-based PDF that's easy to share and update. 

Certifications that elevate your credibility 

To be taken seriously as a professional interior designer, especially in kitchen and bath, it's important to pursue recognized credentials. Certifications not only validate your expertise but also open doors to more advanced projects and professional opportunities. 

NKBA certifications

NKBA (National Kitchen & Bath Association) offers highly regarded certifications that demonstrate technical proficiency, safety awareness, and excellence in execution. These include: 

NCIDQ (National Council for Interior Design Qualification)

Required in many U.S. states for licensed interior designers working in commercial or code-compliant environments. 

NARI certification

Especially relevant for professionals working on renovation or remodeling projects, NARI certifies advanced knowledge in kitchen design, green remodeling, and project management. 

Joining industry organizations and networks 

Networking is essential in interior design. Becoming active in industry groups helps you stay informed, connected, and credible. 

These networks provide access to job boards, exclusive training, and peer support. They also increase your visibility within the design community – especially if you're aiming to specialize in residential design. 

Tools, skills, and software to master 

To succeed as a professional interior designer, you'll need to become proficient with industry-standard tools for planning, visualization, and communication. 

Key skill areas include: 

Design Flex software gives certified professionals access to an integrated platform for space planning, client collaboration, and 3D visualization. Many academic partners incorporate Design Flex into their curriculum to give students a competitive edge. 

Other skills to develop: concept sketching, mood board creation, and specification documentation. 

Finding work and launching your career 

Interior designers can work in a range of settings: 

To break in: 

Common roadblocks and how to overcome them