Some mistakenly equate “Universal Design” and “accessibility.” While universal design incorporates many design features that improve access for people with disabilities, the principles focus on common needs and preferences of all people.
PRINCIPLE ONE: Equitable Use 
The design is useful and marketable to people with diverse abilities.
The wide, no-step entrance welcomes parents with strollers as well as those using walkers or wheelchairs and makes moving furniture and appliances easier.
PRINCIPLE TWO: Flexibility in Use
The design accommodates a wide range of individual preferences and abilities.
Single-lever faucets can be used with right or left hand or elbow; handled showerheads allow showering while standing or seated.
PRINCIPLE THREE: Simple and Intuitive Use 
Use of the design is easy to understand, regardless of the user's experience, knowledge, language skills, or current concentration level. The layout of this stove makes it easy to match each control to the proper burner.
PRINCIPLE FOUR: Perceptible Information 
The design communicates necessary information effectively to the user, regardless of ambient conditions or the user's sensory abilities. Thermostats with simple, high-contrast graphics, audio and tactile feedback make comfort and energy efficiency easier for everyone.
PRINCIPLE FIVE: Tolerance for Error
The design minimizes hazards and the adverse consequences of accidental or unintended actions. Night lighting in hallways and on stairs reduces risk of falls; anti-scald water controls reduce risk of burns.
PRINCIPLE SIX: Low Physical Effort 
The design can be used efficiently and comfortably and with a minimum of fatigue. Lever door handles accommodate people with manual limitations and those carrying a precious package.
PRINCIPLE SEVEN: Size and Space for Approach and Use 
Appropriate size and space is provided for approach, reach, manipulation and use regardless of user's body size, posture or mobility. Carefully located wall outlets and switches are within convenient reach for anyone.