Social innovation is based on the idea of addressing emerging social needs. Social innovation may act as a catalyst for providing effective solutions to address environmental and social issues. This article considers the relationship between sustainable development, social justice and social innovation. This article is based on a desktop study using authoritative literature and secondary data. The findings of the research suggest that social innovation can act as a nexus to facilitate sustainable development and social justice. The globe is faced with a number of grand challenges which requires interconnected, multifaceted solutions, social innovation is an avenue to provide holistic solutions to grand challenges. Best practices to increase social innovation was identified in this article, including a bottom approach to development, social innovation hubs, social entrepreneurship and social business park. Social innovation provide new solutions to empower communities, improve resource sharing and attain the Sustainable Development Goals (SDGs).