This study mainly aims to address the housing requirements of senior citizens through meeting their basic needs for physical housing while valuing the particular human needs and demands of older people. As the number and frequency of their social ties decrease, senior citizens spend most of their time at home. As a result, they suffer a larger number of accidents in the home. Although carelessness is a cause, the main reason for seniors household accidents is that the general structure, fixtures and appliances of housing do not take into account the particular needs of older people. This study investigates the accident patterns of older people, addresses structural obstructions, and proposes guidelines for ergonomic interior design and household management which take into account universal design and the special needs of senior citizens. This study explores the following: 1) Accident causes and patterns in senior households, as the specific characteristics, requirements of older people. 2) An analysis of safety improvement plans and application. 3) Determining each rooms layout by functional requirement. 4) A final set of proposed interior design guidelines for senior housing.