For many homeowners, the difference between a good interior designer and a bad one is simply a matter of taste — but all good designers have similar skill sets. Interior designers usually have a degree or certificate in interior design, with training in design principles and lighting, drafting, and computer aided design (CAD) software. Good interior designers have strong color balancing skills and understand how different colors influence spatial perception and moods. They know the building and electrical codes in the areas where they practice, and they make sure that any contractors they hire also work to those codes. They are knowledgeable about different upholstery fabrics and draperies, stay ahead of residential design trends, and maintain their own individual creativity. Also, good interior designers have excellent space designing skills, so they can arrange a space efficiently and with ideal traffic flow. Ultimately, hiring a good interior designer means pinpointing one whose signature style is complementary to your personal style — so checking out many designers’ portfolios is a must — and whose communication methods match yours.