This chapter explores the opportunity for co-designing change and embedding social value through engaging communities in placemaking. It considers the benefits that engagement and co-design can play in improving place quality and equality, as well as project efficiency for those commissioning, leading, and delivering schemes. Through unpicking what each party can bring to a collaborative placemaking process, we begin to unlock that opportunity and enhance social value impact. Through snapshots of interactive engagement activities, we also introduce the basic principles and mechanisms for instigating and supporting a collaborative approach to design and placemaking that ensures these processes create opportunities for empowerment and social value creation. The chapter demonstrates how this approach can help achieve selected Sustainable Development Goals (SDGs); specifically, SDGs 9 Industry, innovation, and infrastructure, 10 Reduced inequalities, 11 Sustainable cities and communities, and 17 Partnership for the goals.