Buildings contribute to environmental degradation due to large energy usage and carbon emission production. Awareness to protect the environment, and reduce the impact of development, make the concept of sustainable development is applied through good planning by implementing sustainable design. As a planner of a building or even a region, architect needs to implement a sustainable design to reduce the damage caused by development. This study aims to analyze the awareness of the architect in applying sustainable design as an effort to protect the environment. The study was conducted using quantitative methods, by collecting data through questionnaires. The sampling technique is carried out by purposive sampling method. Purposive sampling is a technique for sampling data sources with certain considerations. The results have shown that there are influence between environmental awareness and green building knowledge, toward architect perception on green building implementation.