traditional houses have served as symbols of cultural identity, regional climate adaptation, and craftsmanship. Decorative and architectural elements within these houses such as intricate carvings, geometric, floral, and religious motifs were an integral part of regional cultural and artistic expression, endowing the structures with aesthetic significance and symbolic meaning. The present study aimed to examine the application of architecture-dependent decorations in the principles of sustainable architecture of traditional houses and their compatibility with modern houses in Mashhad city. Sustainable architecture is a design and construction process that emphasizes efficiency, economic sustainability, environmental friendliness, and other environmental benefits. The term sustainability refers to three pillars: ecology, economy and community. The present study was descriptive-survey in terms of method type and applied in terms of purpose. Every scientific research needs its own appropriate methods. Choosing an appropriate research method and continuing it throughout the entire research process is one of the strategic principles of a scientific research. The way of facing the problem and research is closely and mutually related to the structure and nature of the research in some case studies in Mashhad city. The findings shows that in traditional architecture, principles such as respect for the environment and ecosystem, energy efficiency, and the use of spaces to provide a comfortable living experience are observed. Finally, understanding the key elements of traditional Mashhad architecture and interior decoration, and applying them in a way compatible with sustainability principles, can serve as a practical model for designing new buildings and restoring historical structures.