building designer
Professional Building Designers, or Home Designers, specialize in designing single family homes. In some cases, they may also design other light frame residential buildings, agricultural buildings, and decorative facades for larger buildings. Unlike architects, Home Designers are not legally required to pass exams or receive special licenses. However, a designer who carries the title “Certified Professional Building Designer” or “CPBD” has completed training courses, practiced building design for at least six years, and passed a rigorous certification exam. (About.com)